TY  - BOOK
AU  - Watt, Kenneth E. F.
TI  - Principles of Environmental Science
SN  - 0070685754
U1  - 301.3 
PY  - 1973///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Social sciences
KW  - Sociology
KW  - Human ecology
ER  -