Hegner, Robert W.
Invertebrate zoology / Robert W. Hegner and Joseph G. Engemann. - 2nd ed. - New York : Macmillan, c1968. - xviii, 619 p. : ill. ; 23 cm.
Includes bibliographies and index.
68010240
Invertebrates.
Zoology.
QL362 / .H4 1968
591 / HEI
Invertebrate zoology / Robert W. Hegner and Joseph G. Engemann. - 2nd ed. - New York : Macmillan, c1968. - xviii, 619 p. : ill. ; 23 cm.
Includes bibliographies and index.
68010240
Invertebrates.
Zoology.
QL362 / .H4 1968
591 / HEI