TY  - BOOK
AU  - Ehrlich Paul R
AU  -  Ehrlich Anne H
TI  - Population resources environment :  Issues in human   
T2  - Series of books in biology. Ed by donald Kennedy and R B Park
U1  - Y:5, L0;L2 
PY  - 1972///
CY  - San Francisco  
PB  - Freeman         
N1  - Bibliography : P482-488 and at the end of each chapter; Appendices : P449-482
ER  -