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