TY  - GEN
AU  - Hyman , Libbie Henrietta 
TI  - The invertebrates Vol; II: platyhelminthes and rhynchocoela the acoelomate bilateria 
U1  - 592 
PY  - 1993///
CY  - New Delhi
PB  - CBS Publishers
KW  - Animals
KW  - Zoology
ER  -