| 1. |  | Principals at Purdue Time and Motion Study Conference | Purdue University--Faculty;Meetings;Gilbreth, Lillian Moller, 1878-1972;Potter, A. A. (Andrey Abraham), b. 1882 | Dr. Lillian Gilbreth (2nd right, 1st row), A. A. Potter (left, 1st row). Principals at Purdue Time and Motion Study Conference, May 11, 1937. From A. A. Potter papers. 1 copy. |
