TY  - BOOK
AU  - Botkin,Daniel B.
AU  - Keller,Edward A.
TI  - Environmental studies: the Earth as a living planet 
SN  - 0-675-09813-0
U1  - 577.27 BOT 
PY  - 1982///
CY  - Columbus
PB  - Charles E.Merrill Publishing Company
KW  - Pollution
KW  - Environmental aspects
KW  - Conservation of natural resources
N1  - Includes bibliographies and index
ER  -