TY  - BOOK
AU  - Ehrlich,Paul R.
AU  - Ehrlich,Anne H.
TI  - Population resources environment: issues in human ecology 
SN  - 0-7167-0680-6
U1  - 304.2 E337 1970 
PY  - 1970///
CY  - San Francisco
PB  - W.H. Freeman and Company
KW  - Human ecology
N1  - Includes bibliographical references, glossary and index
ER  -