TY  - BOOK
AU  - Hyman, Libbie Henrietta
TI  - The invertebrates : vol. II: platyhelminthes and rhynchocoela the acoelomate bilateria 
U1  - 592 
PY  - 1951///
CY  - New York
PB  - McGraw-Hill
KW  - Zoology
KW  - Invertebrates
ER  -