TY  - BOOK
AU  - Mills,D.H.
TI  - An introduction to freshwater ecology
SN  - 0050023977
U1  - 577.6/M657i 
PY  - 1972///
CY  - Edinburgh
PB  - Oliver & Boyd
KW  - Ecology
N1  - Bibliographical references and index at the end
ER  -