TY  - GEN
AU  - Verrill,A.E.
TI  - Synopsis of the North American fresh-water leeches
PY  - 1874///
CY  - Washington : 
PB  - [s.n.], 
N1  - Extract from the report of Prof. S.F. Baird, Commissioner of Fish and Fisheries. Part 2, Report for 1872-'73
ER  -