TY  - BOOK
AU  - Botkin,Daniel B.
AU  - Keller,Edward A.
TI  - Environmental Studies: Earth as a Living Planet 
SN  - 0675-204623-01
AV  - QH541 B51
PY  - 1987///
CY  - Columbus
PB  - Merrill Pub. Co.
KW  -  
KW  - Ecology
KW  - Pollution
KW  - Conservation of natural resources
N1  - Includes bibliographies and index
ER  -