प्रस्तावित विषय : खोज निहित
प्रस्तावित विषय : खोज निहित
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1Ames, Agricultural Extension Service, Iowa State College.15 v. maps, tables. 28 cm.विषय: “...Agriculture Economic aspects Iowa....”
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2प्रकाशित 1938Ames : The Service, 1938-1939.2 v. : ill.विषय: “...Agriculture Economic aspects Iowa Periodicals....”