| 1. |  | Purdue faculty and administrators at U.S. War Dept. plant protection | Potter, A. A. (Andrey Abraham), b. 1882; Purdue University--Faculty; Hockema, Frank C., 1892-; Stewart, Robert Bruce; Fingerprinting;Cameras | U.S. War Dept. Plant Protection. R.B. Stewart, controller being photographed. F.C. Hockema being fingerprinted as A.A. Potter looks on; ca. 1940s. |
