TY  - BOOK
AU  - Dasmann,R.F.
TI  - Planet in peril: man and the biosphere today 
U1  - 301.31 
PY  - 0000///[n. d.]
CY  - Middlesex
PB  - Penguin Books
KW  - Ecology
KW  - Nature
KW  - Effect of human beings on
KW  - Nature conservation
ER  -