TY  - BOOK
AU  - Ewer D W
AU  - Hall J B
TI  - Ecological biology: v.2-inter-relations of organisms
SN  - 0-582-60648-9
U1  - 577 
PY  - 1978///
CY  - London
PB  - Longman
KW  - Biology-juvenile literature
KW  - Ecology
ER  -