Makki SS, LG Tweeten and CS Thraen (1999). “Investing in Research and Education Versus Commodity Programs: Implications for Agricultural Productivity.” JPA 12(1): 77-94.

Makki SS, LG Tweeten and CS Thraen (1999). “Investing in Research and Education Versus Commodity Programs: Implications for Agricultural Productivity.” JPA 12(1): 77-94.

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