TY  - BOOK
AU  - Alison leadley brown
TI  - Ecology of fresh water
SN  - 0435615378
U1  - 574.52632 
PY  - 1971///
CY  - London
PB  - Heinemann Educational Books Ltd
KW  - Trophic relectionship
N1  - Inclodinding Index Bibliographie
ER  -