The Oxford book of invertebrates protozoa, sponges, coelentera- tes, worms, molluscs, echinoderms, and arthropods (other than insects) - Nichols, David; Cooke, John A.L.; Whiteley, Derek (Derek Alan Alexander) (Oxford Oxford University Press, 1979)
Reprinted with corrections 1979
Bibliography: p.210
Keywords: Invertebrates