- PRAS : Roger Schmitz Offprints: Printed Material 1921-1989
Collection of offprints and articles concerning Chemical Reactor Stability & Dynamics, dating mainly 1950-1986 (but including some 1921-49 and 1987-89).
- PRAS 1/ Group : Offprints, (1921-) 1950-1961
- PRAS 2/ Group : Offprints, 1962-1964
- PRAS 3/ Group : Offprints, 1965-1967 (G)
- PRAS 4/ Group : Offprints, 1967 (H) - 1969 (G)
- PRAS 5/ Group : Offprints, 1969 (H) - 1970
- PRAS 6/ Group : Offprints, 1971 - 1972 (I)
- PRAS 7/ Group : Offprints, 1972 (J) - 1973 (S)
- PRAS 8/ Group : Offprints, 1973 (T) - 1975
- PRAS 9/ Group : Offprints, 1975-1977
- PRAS 10/ Group : Offprints, 1977-1978
- PRAS 11/ Group : Offprints, 1979-1980
- PRAS 12/ Group : Offprints, 1980
- PRAS 13/ Group : Offprints, 1980-1981
- PRAS 14/ Group : Offprints, 1981-1982
- PRAS 15/ Group : Offprints, 1982-83
- PRAS 16/ Group : Offprints, 1984
- PRAS 17/ Group : Offprints, 1984-1985
- PRAS 18/ Group : Offprints, 1986 (-1989) and various dates