Ephemera
- POBR 21/16 Folder : Black holes 1974
- POBR 22/01 Folder : Boxing 1950-1960
- POBR 22/02 Folder : Braveliaud, Frances 1961
- POBR 22/03 Folder : C (Cana Conference,Chair of Unity Octave, Christianity 1951-1964
- POBR 22/03 Folder : C (Claretian publication, Communism; Cavanaugh) 1951-1964
- POBR 22/04 Folder : C (Cigarette smoking) 1963-1969
- POBR 22/05 Folder : can Christians Unite? / by Rev. John A. O'Brien c1959
- POBR 22/06 Folder : Catholic Association for International Peace 1942-1943
- POBR 22/07 Folder : Catholic Census information c1957
- POBR 22/08 Folder : Catholic Digest survey on religion 1966
- POBR 22/09 Folder : The Catholic world 1942
- POBR 22/10 Folder : Census and information program 1957-1960
- POBR 22/11 Folder : The Catholic hour, talks given by Rev. John A. O'Brien 1955-1956
- POBR 22/11 Title : The mark of a Christian 1955
- POBR 22/11 Title : Love's magic and mystery 1955
- POBR 22/11 Title : The Home: a citadel of Love 1955
- POBR 22/11 Title : The stairs of Adversity 1956
- POBR 22/11 Title : The challenge of Life 1956
- POBR 22/11 Title : The victory of Faith 1956
- POBR 22/11 Title : The conquest of fear 1956
- POBR 22/12 Folder : The Catholic hour, marked copies 1955-1956
- POBR 22/13 Folder : Catholic information centers c1946
- POBR 22/14 Folder : Celibacy 1967-1968
- POBR 22/15 Folder : Celibacy questionnaire 1970
- POBR 22/16 Folder : Celibacy / articles 1968-1970
- POBR 22/16 Title : Celibacy: compulsory or optional / by Rev. John A. O'Brien 1968
- POBR 22/17 Folder : Joseph M. Champlin c1968
- POBR 22/18 Folder : Charts, miscellaneous nd
- POBR 22/19 Folder : China in the U.S.A. 1949
- POBR 22/20 Folder : Christian Century 1963
- POBR 22/21 Folder : Christopher news notes 1950-1974
- POBR 22/22 Folder : Christopher news notes 1960-1974
- POBR 22/23 Folder : Christopher news notes 1967-1973
- POBR 22/24 Folder : The Christophers c1972
- POBR 23/01 Folder : Communion 1944-1949
- POBR 23/02 Folder : Communism 1938
- POBR 23/03 Folder : CCD 1947-1971
- POBR 23/04 Folder : Convert apostolate manuscripts 1948-1962
- POBR 23/05 Folder : Convert makers of America 1946-1971
- POBR 23/06 Folder : Converts 1947-1954
- POBR 23/07 Folder : Converts 1945
- POBR 23/08 Folder : Crusade for Souls 1955-1959
- POBR 23/08 Title : Vermont's Operation Doorbell makes history / by Rev. John A. O'Brien 1959
- POBR 23/08 Title : Buffalo's diocese unearths 88,760 unlisted Catholics! / by Rev. John A. O'Brien 1959
- POBR 23/09 Folder : Direction: Unity 1966-1967
- POBR 23/10 Folder : Divorces 1945-1946
- POBR 23/11 Folder : Durham cathedral 1948
- POBR 23/12 Folder : E (Ear, Easter, Election, Ellis) 1960-1967
- POBR 23/13 Folder : Evolution 1925-1930
- POBR 23/13 Title : Evolution and Religion / by Rev. John A. O'Brien 1930
- POBR 23/13 Title : Belief in God and in Evolution / by Rev. John A. O'Brien 1930
- POBR 23/14 Folder : F (Fair Campaign Practices, Faith, Funeral; Ford) 1962-1967
- POBR 23/15 Folder : Family Planning 1961-1966
- POBR 23/16 Folder : G (Gillese, Graham) 1960-1964
- POBR 23/17 Folder : Mahatma Gandhi / by Rev. John A. O'Brien 1945
- POBR 23/18 Folder : Richard Ginder: "it does make a difference" nd
- POBR 23/19 Folder : The Greatest Name / by Rev. John A. O'Brien 1943
- POBR 23/20 Folder : H (Human Rights) 1963
- POBR 23/21 Folder : H (Homilies) 1972
- POBR 23/22 Folder : Hesburgh - Addresses/articles by Rev. Theodore Hesburgh 1954-1974
- POBR 23/22 Title : The true spirit of Notre Dame 1954
- POBR 23/22 Title : thoughts for our times 1961-1962
- POBR 23/22 Title : change and the changeless 1961
- POBR 23/22 Title : Science and Technology in modern perspective - Science and Man 1962
- POBR 23/22 Title : a new vision for spaceship Earth 1973
- POBR 23/22 Title : a rapidly changing Catholicism 1974
- POBR 23/23 Folder : Hostile literature (Anti-Catholic polemics) 1950-1965
- POBR 23/24 Folder : I (the Institute on Man and Science) 1966-1968
- POBR 24/01 Folder : I (International relations council) 1966-1968
- POBR 24/02 Folder : I (interview with a missionary from India) 1943
- POBR 24/03 Folder : India 1963
- POBR 24/04 Folder : Integration 1960-1965
- POBR 24/05 Folder : Jehovah's Witnesses 1939-1946
- POBR 24/06 Folder : Jews 1955-1967
- POBR 24/07 Title : They fought against "ignorance with spurs" / by Rev. John A. O'Brien 1958
- POBR 24/09 Folder : Jews - American Jewish committee 1960-1963
- POBR 24/10 Folder : Jews - API bulletin, Edith Stein guild newsletter 1960-1968
- POBR 24/11 Folder : Eugene Kennedy: "Priests shouldn't Marry" 1968
- POBR 24/12 Folder : Knights of Columbus news 1966-1971
- POBR 24/13 Folder : L (Liturgical renewal, Martin Luther) c1956-1964
- POBR 24/14 Title : Father O'Brien and Martin Luther / by Joseph W. Sharts c1956
- POBR 24/16 Folder : L (Labor, Latin America; Lackman, Lee, Lombardi) 1958-1963
- POBR 24/17 Folder : Life in a Mexican village, by Rev. John A. O'Brien 1945
- POBR 24/18 Folder : Liturgy c1964
- POBR 24/19 Folder : M (Mass, Manuscript, Martyr's Shrine Message, Mormon) 1967-1971
- POBR 24/20 Folder : Marquette's exploration down the Mississippi / by Rev. John A. O'Brien 1950
- POBR 24/22 Folder : Marriage 1946
- POBR 24/23 Folder : Mary 1944-1965
- POBR 25/01 Folder : Masons - Addresses and Mss 1960-1965
- POBR 25/01 Title : Friendship, first step to Christian Unity / by Rev. John A. O'Brien 1965
- POBR 25/01 Title : why can't Catholics be Masons? / by Rev. John A. O'Brien 1960
- POBR 25/02 Folder : Masons - Misc 1961-1969
- POBR 25/03 Folder : Masons - Misc 1966-1972
- POBR 25/03 Title : new friendship between Masons and Catholics / by Rev. John A. O'Brien 1972
- POBR 25/04 Folder : Masons - newsletter 1962-1969
- POBR 25/05 Folder : Masons 1938-1974
- POBR 25/06 Folder : Masons 1969
- POBR 25/06 Title : Catholics and Masons: now good friends / by Rev. John A. O'Brien 1969
- POBR 25/07 Folder : Mexican Synarchism / by Rev. John A. O'Brien 1943
- POBR 25/08 Folder : Mexico 1942