TY  - BOOK
AU  -  Macan,T.T.
TI  -  A guide to freshwater invertabrate animals / 
U1  -  591.929 
PY  - 1959///
CY  -  England : 
PB  -  Longmans, 
KW  -  Freshwaters invertabrates
KW  -  Great Britain
N1  -  Includes bibliographical references
ER  -