Bayer, Frederick M. The free-living lower invertebrates [by] Frederick M. Bayer and Harding B. Owre. - New York, Macmillan [1967, c1968] Bibliography: p. 205. LCCN: 67013600 //r90 Subjects--Topical Terms: Invertebrates. LC Class. No.: QL362 / .B3 Dewey Class. No.: 592