Van Cleef, E. (1945). Postwar foreign trade employment and sales prospects in Ohio. Bureau of business research, College of commerce and administration, the Ohio state university.

Van Cleef, Eugene. Postwar Foreign Trade Employment and Sales Prospects in Ohio. Columbus, O.: Bureau of business research, College of commerce and administration, the Ohio state university, 1945.

Van Cleef, Eugene. Postwar Foreign Trade Employment and Sales Prospects in Ohio. Bureau of business research, College of commerce and administration, the Ohio state university, 1945.