TY  - BOOK
AU  - Simmons,Ian Gordon
TI  - The ecology of natural resources
SN  - 0713163283
U1  - 333.7 
PY  - 1981///, c1974
CY  - London
PB  - Edward Arnold, 
KW  - ECOLOGIA
KW  - RECURSOS NATURALES
UR  - https://www.cicy.mx/sitios/sib/doctoelectronico/768.pdf
ER  -