By Siegel, Sidney
By Coulson, J.M., Richardson, J.F.
By Great Britain: Department of the Environment
By James, Michael
By Peterson, James L., Silberschatz, Abraham
By Hodge, E.D., Wood, Bertram Gerald J.
By Atwood, Jim D
By Torrington, Derek, etc.
By Katz, Arnold M
By Fry, L.
By Dornbusch, Rudiger, Fischer, Stanley
By Collard, Ron
By Cubbitt, J.M., Henley, S.
By Hecht, Eugene, Zajac, Alfred, Zajic, A.
By Ian F. Tannock, Richard P. Hill
By Raymond J. Roark, Warren C. Young