verma , p.s.
environmental biology principles of ecology / [[Book] :] p.s. verma , v. k. agarwal . - new dlhi : s. chand & company ltd, 1983. - 591 p. : ill; ; 21 cm.
includes index . .
8121908590
Biology. --Organisms .
Ecology.
570
570 / V E
environmental biology principles of ecology / [[Book] :] p.s. verma , v. k. agarwal . - new dlhi : s. chand & company ltd, 1983. - 591 p. : ill; ; 21 cm.
includes index . .
8121908590
Biology. --Organisms .
Ecology.
570
570 / V E