A monograph of the acanthodriline earthworms of South Africa

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A monograph of the acanthodriline earthworms of South Africa

by Grace Evelyn Pickford

W. Heffer, 1937

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注記

"Part I. of this monograph was presented as a dissertation to the faculty of the graduate school of Yale University in candidacy for the degree of Doctor of Philosophy"--T.p. verso

Includes bibliographical references and index

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