TY  - BOOK
AU  - Ehrlich Paul  R
TI  - Human ecology :  Problems and solutions
T2  - A series of books in biology ed by Donald Kennedy and Roderic and B Park
U1  - Y17:G:5, L3-;1 
PY  - 1973///
CY  - San
PB  - Francisco W H Freeman    
KW  - SOCIOLOGY
N1  - Appendix p281-288
ER  -