United States. Bureau of Labor Statistics
P. A. Nel
Esmond G. Devas
Fisher, Irving
Bela A. Balassa
R. J. Brideson
Li Lian Ong
Süleyman Özmucur
Addison Wiggin
Magazine Marketing Service.
Bernard Schmitt
United States. Congress. House. Committee on Banking and Currency
International Comparison Programme
Alan M. Taylor
Shiu-Sheng Chen
George Alessandria
Dr. Purna Chandra Parida, NCAER, New Delhi, India
Birla Institute of Scientific Research. Economic Research Division.
Georges Vialet
Spain. Instituto Nacional de Estadística.