Principles of environmental biology /
Nair, P.K.G.
Principles of environmental biology / P.K.G. Nair - New Delhi : Himalaya publishing house, 1993. - 190 p. : ill. ; 20 cm.
Biology.
Ecology.
577 / NAP
Principles of environmental biology / P.K.G. Nair - New Delhi : Himalaya publishing house, 1993. - 190 p. : ill. ; 20 cm.
Biology.
Ecology.
577 / NAP