TY  - BOOK
AU  - Detwyler, Thomas R.
TI  - Man's impact on environment
U1  - 304.28 
PY  - 1971///
CY  - New York
PB  - Mc - Graw - Hill
KW  - Environmental problems
KW  - Social Science
KW  - Social problems and sevices
N1  - Includes glossary, index, bibliographical references
ER  -