Principles of environmental conservation /
Singh, H. S.
Principles of environmental conservation / H. S. Singh. - India : International Book Distributors, 1989. - 273 p.
8770891019
Ecological processes
Biotic regions--Geography
363.7 / SIN 1989
Principles of environmental conservation / H. S. Singh. - India : International Book Distributors, 1989. - 273 p.
8770891019
Ecological processes
Biotic regions--Geography
363.7 / SIN 1989