TY  - BOOK
AU  - Mills, Derek Henry.
TI  -  An introduction to freshwater ecology
SN  - 0050023977
U1  - 577.6 23
PY  - 1972///
CY  - Edinburgh
PB  - Oliver and Boyd
KW  - Freshwater ecology
N1  - Includes bibliographical references p. ( 93-95 ) and index
ER  -