TY  - BOOK
AU  - Simmons, I.G.  .
TI  - Ecology of natural resources / 
SN  - 0-7131-6358-5
U1  - G:55 
PY  - 1974///
CY  - London : 
PB  - Edward Arnold (Publishers) Ltd. , 
KW  - Ecology
ER  -