por Press, Frank, 1924- [autor] | Siever, Raymond [autor] | Menking, Kirsten [autor] | Menking, Kirsten. Environmental geology | De Wet, Andrew. Environmental geology | Merritts, Dorothy J, 1958-. Environmental geology.
por Merritts, Dorothy [autor] | DeWet, Andrew [autor] | Menking, Kirsten [autor].
por Merritts, Dorothy J, 1958- [autor] | Menking, Kirsten [autor] | De Wet, Andrew [autor].