TY  - BOOK
AU  - Hyman, Libbie Henrietla  .
TI  - Invertebrates:Acanthosephala, ashelminthes and Entoprocta the pseudocoelomate bilateria, vol-3 / 
U1  - 592 
PY  - 1951///
CY  - New York : 
PB  - McGraw Hill Book Company , 
ER  -