TY  - GEN
AU  - Turt, Jonathan 
TI  - Ecosystems, energy, population
SN  - 9780721689302
U1  - 301.31 
PY  - 1975///
CY  - Philadelphia
PB  - W.B.Saunders
KW  - Ecology
KW  - Environmeta : Biological aspect
KW  - Human ecology
ER  -