TY  - GEN
AU  - DETWYLER, Thomas R
TI  - Man's imapct on environment
SN  - 0-07-016592-0
AV  - GF75.D48 
PY  - 1971///
CY  - New York
PB  - McGraw Hill
KW  - Man-influence on nature
KW  - Pollution
ER  -