VERMA, P.S.
Principles of ecology ( environmental biology) / [by] P.S.Verma - 4th ed. - New Delhi S.Chand 1989 - viii, 591 p.
Includes glossary, bibliography and index.
591.5 / VER
Principles of ecology ( environmental biology) / [by] P.S.Verma - 4th ed. - New Delhi S.Chand 1989 - viii, 591 p.
Includes glossary, bibliography and index.
591.5 / VER