Invitations to Lecture /repositories/5/archival_objects/1120545 1 box 1933-1976 1933-1939 /repositories/5/archival_objects/1121117 1 folder 1933-1939 4c 51 1949, 1957-1958 /repositories/5/archival_objects/1121118 1 folder 1949 1957-1958 4c 52 1960-1965 /repositories/5/archival_objects/1121119 1 folder 1960-1965 4c 53 1966-1969 /repositories/5/archival_objects/1121120 1 folder 1966-1969 4c 54 1970-1974, 1976 /repositories/5/archival_objects/1121121 1 folder 1970-1974 1976 4c 55