TY  - BOOK
AU  - Ehrlich, Paul R.
TI  - Population resources environment: issues in human ecology 
SN  - 0716706806
U1  - GC 304.2 Eh89 1990 
PY  - 1970///
CY  - San Francisco
PB  - W.H Freeman
KW  - Human ecology.
N1  - Includes bibliographical references and index
ER  -