TY  - BOOK
AU  - SImmons I G
AU  - I G Simmons
TI  - The ecology of natural resources
SN  - 0713162383
U1  - 577.5 
PY  - 1981///
CY  - London
PB  - ELBS Edward arnold ltd.
KW  - Water and forestry
KW  - Food and agricolture
KW  - Minerals and energy
ER  -