TY  - BOOK
AU  - Ehrlich, Paul R. .
TI  - Human Ecology: Problems and Solutions / 
SN  - 0-7167-0595-8
U1  - G:5 
PY  - 1969///
CY  - San Francisco : 
PB  - W.H. Freeman and Company , 
KW  - Life Science <Ecology>
ER  -