United States. Bureau of the Census
Rand McNally
Great Britain. Central Office of Information. Reference Division.
Joe Staten Bain
M. S. Silver
George Phillips Bevan
Gideon Rosenbluth
Dunning, John H.
David Horsfall
Indian National Congress. National Planning Committee.
Malcolm Keir
J. R. Bryson
British Information Services
United States Tariff Commission.
Statistics Canada.
Jacob A. Jordaan
Pratten, C. F.
Reinhold P. Wolff