Linda Hogan
United States. Dept. of Agriculture. Natural Resource Economics Division.
United States. General Accounting Office
Bateman, John
Bramwell, George William Wilshere Bramwell Baron
Tembeka Ngcukaitobi
Andro Linklater
H. D. Davies
Constance Perin
Ian C. Winter
William J. Smole
Paul J. Culhane
Keith Jacobs
Paul Chatterton
Buis T. Inman
United States. Dept. of Agriculture. Natural Resource Economics Division
Stefania Bracco
A. Harrison
Paul Nissenbaum