United States. General Accounting Office
Carolyn A. Sellars
Jeffrey A. Klein
Pollution Control Industry Seminar Rye, N.Y. 1974.
Inc Arthur D. Little
Kenneth Chʻuan-kʻai Leung
Pollution Control Industry Seminar White Sulphur Springs, W. Va. 1973.
William T. Lorenz
Unknown Author
Gary M Pierzynski
Jen Green
Johnson, James H.
Andrew Farmer
Timothy J. Havranek