The Cleland mss., 1911-1946, consists of the papers of botanist Ralph Erskine Cleland, 1892-1971. They consist chiefly of correspondence with prominent scientists on Oenothera, evening primrose.
The Langer mss., 1940-1976, consist of the professional papers and reprints of Lawrence Marvin Langer, 1913-2000, physicist and Professor Emeritus of Physics at Indiana University.