Copyright © 1996 State Historical Society of Iowa. This article is posted here for personal use, not for redistribution.
Smith, Daniel S. "How a Half-Million Iowa Women Suddenly Went to Work: Solving a Mystery in the State Census of 1925." The Annals of Iowa 55 (1996), 374-393.
Available at: http://ir.uiowa.edu/annals-of-iowa/vol55/iss4/6