Oliver Scott Goldsmith
Jim Kell
United States. Bureau of Economic Analysis
Albert W. Niemi
Richard Kauffman
Robert J. Korbach
Gary W. Smith
Unknown Author
Kerry Sutten
United States. General Accounting Office
Consejo Federal de Inversiones (Argentina)
Andhra Pradesh (India). Directorate of Economics and Statistics
Economic and Political Weekly Research Foundation
Mexico (Mexico : State). Instituto de Información e Investigación, Geográfica, Estadística y Catastral
Daniel Grenouilleau