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1by Robertson, Lynn Shelby, 1890-### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1951Philadelphia, Lippincott [1951]xii, 546 p. illus., maps. 22 cm.Subjects: “...Agriculture Economic aspects United States Textbooks....”
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2by Robertson, Lynn Shelby, 1890-### CRL customization ### ?> ### Add publisher and desc details ### ?>
Published 1946Chicago, Philadelphia [etc.] J.B. Lippincott Co. [1946]xii, 546 p. incl. illus. (incl. plans, diagrs.) tables. 22 cm.Subjects: “...Agriculture Economic aspects United States Textbooks....”