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	1.	No cover image available Resource demand and structure of the agricultural industry by Heady, Earl O Tweeten, Luther G Material type: Text; Format: print ; Literary form: Not fiction Publication details: Ames Iowa State University Press 1963 Availability: Items available for loan: Ahmedabad (1)Call number: 338.10973 H3R3. Place hold
	2.	No cover image available Roots of the farm problem: changing technology, changing capital use, changing Labour needs Heady, Earl O. by Heady, Earl O Haroldsen, Edwin O Mayer, Leo V Tweeten, Luther G Material type: Text; Format: print ; Literary form: Not fiction Publication details: Ames, Iowa Iowa State University Press 1965 Availability: Items available for loan: Ahmedabad (1)Call number: 338.10973 H3R6. Place hold

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