Environmental Studies :
Botkin, Daniel B.
Environmental Studies : Earth as a Living Planet / Daniel B. Botkin, and Edward A. Keller. - Second Edition. - Columbus : Merrill Pub. Co., 1987. - xvi, 685 p., 16 p. of plates : ill. (some col.) ; 24 cm.
Environmental Studies : Earth as a Living Planet / Daniel B. Botkin, and Edward A. Keller. - Second Edition. - Columbus : Merrill Pub. Co., 1987. - xvi, 685 p., 16 p. of plates : ill. (some col.) ; 24 cm.