TY  - BOOK
AU  - Greenhalgh, Malcolm.
AU  - Ovenden, Denys
TI  - Freshwater life: Britain and Northern Europe 
SN  - 9780007177776
PY  - 0000///19 cm
CY  - 256 p.
PB  - col. ill
KW  - Freshwater animals
KW  - Europe, Northern
KW  - Identification
KW  - Great Britain
KW  - Freshwater plants
N1  - Includes bibliographical references (p. 247-248) and index
ER  -