TY  - BOOK
AU  - Ehrlich P R
AU  -  Ehrlich A H
AU  -  Holdren J P
TI  - Ecoscience: Population resources environment
U1  - G:5, L7 
PY  - 1977///
CY  - San Francisco 
PB  -  W H Freeman      
KW  - Ecology
ER  -