Hyman L. H., . (1959). The invertebrates: smaller coelomate groups vol.5. New York: Mc Graw Hill Books.
Hyman Libbie Henrietta, . 1959. The invertebrates: smaller coelomate groups vol.5. New York: Mc Graw Hill Books.
Hyman Libbie Henrietta, . The invertebrates: smaller coelomate groups vol.5. New York: Mc Graw Hill Books. 1959.
