TY  - BOOK
AU  - Botkin,Daniel B.
AU  - Keller,Edward A.
TI  - Environmental studies: the Earth as a living planet 
SN  - 0675204623
PY  - 1987///
CY  - Columbus, [Ohio]
PB  - C.E. Merrill Pub. Co.
KW  - Ecology
KW  - Pollution
KW  - Environmental aspects
KW  - Conservation of natural resources
N1  - Includes bibliographies and index; Open access
ER  -