TY  - BOOK
AU  - Ehrenfeld,David W.
TI  - Biological conservation
SN  - 0030800498
PY  - 1970///]
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Nature conservation
KW  - Wildlife conservation
KW  - Pollution
N1  - Published in 1972 under title: Conserving life on earth; Includes bibliographies
ER  -