Invertebrates V: smaller Coelomate groups, Chaetognatha, Hemichordata, Pogonophora, Phoronida, Ectoprocta, Brachiopoda, Sipunculida, the Coelomate Bilateria
- New York Mc Graw Hill Book Co., 1955
- viii,783
- 5 .
V: the smaller Sipunculida, Pogonophora, Phoronida, Invertebrates Hemichordata, groups ectoprocta, Coelomate Coelmate Chaetognatha, Brachiopoda, Bilateria