TY  - BOOK
AU  - Hyman, Libbie Henrietta.
TI  - The Invertebrates: Platyhelminthes and Rhynchocoela the Acoelomate Bilateria / 
SN  - 07-031661-9
U1  - K1 
PY  - 1962///
CY  - New York : 
PB  - McGraw-Hill Book Company , 
ER  -