TY  - BOOK
AU  - Ehrlich Paul R
TI  - Human ecology: Problems and solutions
U1  - Y17:G:5, L3;1 
PY  - 1973///
CY  - San Francisco 
PB  -  W H Freeman      
KW  -  Demography
KW  -  Social pathology
KW  - Anthropology
ER  -