TY  - BOOK
AU  - Botkin,Daniel B.
AU  - Keller,Edward A.
TI  - Environmental studies: the Earth as a living planet 
SN  - 0675098130
AV  - QH541 .B65 1982
U1  - 574.5 19
PY  - 1982///
CY  - Columbus, [Ohio]
PB  - C.E. Merrill Pub. Co.
KW  - Ecology
KW  - Pollution
KW  - Conservation of natural resources
N1  - Includes bibliographies and index
ER  -