United States. General Accounting Office
H. S. Bluston
Keith A. Kvenvolden
Canada. Dept. of Energy, Mines and Resources. Resource Management and Conservation Branch.
Memorial University of Newfoundland. Institute of Social and Economic Research
Alan K. Cooper
Robert W. Rudolph
D Scott Wilson
Ed Punchard
Cogan Sharpe Cogan.
A. M. Spencer
Great Britain. Department of Industry.
Myung W. Lee
Peter A. Scholle
Alan K Cooper
F. W. Dunning
Robert John Kalter