Hegner, Robert W. creator Engemann, Joseph G. text bibliography nyu New York Macmillan c1968 1968 2nd ed. monographic eng

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xviii, 619 p. : ill. ; 23 cm. Robert W. Hegner and Joseph G. Engemann. Includes bibliographies and index. Invertebrates Zoology QL362 .H4 1968 591 HEI 68010240 680301 20141223171852.0 2258156