TY  - BOOK
AU  - Detwyler,Thomas R.
TI  - Man's impact on environment
T2  - McGraw-Hill series in geography
SN  - 0070165920
AV  - GF75 .D48
U1  - 333.7 DET 21
PY  - 1971///]
CY  - New York
PB  - McGraw-Hill
KW  - Nature
KW  - Effect of human beings on
KW  - Pollution
KW  - Economics
N1  - Includes bibliographies
ER  -