TY  - BOOK
AU  - Mann, Kenneth Henry,
TI  - A key to the British freshwater leeches: with notes on their eco logy 
PY  - 0000///195 4
CY  - Ambleside
PB  - Westmorland Freshwater Biological Association
KW  - Leeches
KW  - Worms
KW  - Great Britain
N1  - Includes bibliographical references
ER  -