Canada. Tariff Board.
David W. Skully
William T. Coyle
Isaac W. Griscom
T. E. Josling
Timothy Edward Josling
Unknown Author
Simon Harris
Jean-Jacques Hallaert
United States. Foreign Agricultural Service.
Great Britain. Colonial Office.
Fred H. Sanderson
United States. Bureau of Agricultural Economics. Foreign Agricultural Service
United States Tariff Commission.
Canada. Library of Parliament. Research Branch.
Dimitris Diakosavvas
K. A. Ingersent
Canada. Dept. of Agriculture. Economics Branch. Communications Unit.
United States. Congress. Senate. Committee on Governmental Affairs. Subcommittee on Energy, Nuclear Proliferation, and Government Processes.
Donald Martin Nelson