Economic development : principles and patterns / edited by Harold F. Williamson and
John A. Buttrick,1954
Internet, http://authorities.loc.gov/cgi-bin/Pwebrecon.cgi?DB=local&PAGE=First, 2010-01-27
Information trouvée : 21/03/1901 et 25/10/1989
The American carpet manufacture : a history and an analysis / Arthur H. Cole and Harold
F. Williamson, 1941