TY  - BOOK
AU  - Ehrlich,Paul R.
AU  - Ehrlich,Anne H
TI  - Population resources environment: issues in human ecology  
SN  - 0716706806
U1  - 304.6 19
PY  - 1970///
CY  - San Francisco
PB  - W. H. Freeman and Company
KW  - Population
KW  - Spines
KW  - Human ecology
N1  - Bibliography : p. 360-363; env
N2  - Health and Population
ER  -