TY  - BOOK
AU  - Ehrlich,Paul R.
AU  - Ehrlich, Anne H.
TI  - Population, resources, environment: issues in human ecology 
T2  - A Series of books in biology 
U1  - 301.3  
PY  - 1972///]
CY  - San Francisco
PB  - W. H. Freeman
KW  - Population.
KW  - Pollution.
KW  - Human ecology.
N1  - Third ed. published in 1977 under title: Ecoscience.; Includes bibliographies.
ER  -