The invertebrates : smaller coelomate groups Chaetognatha, Hemichordata, Pogonophora, phoronida, Ectoprocta, Brachiopoda, Sipunculida, The coelomate Bilateria : vol. V. - Hyman, Libbie Henrietta (New York : McGraw-Hill Book Company, 1959)
Includes Bibliography and Index.
Keywords: Invertebrates