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Huffman, W.E., Ball, V.E., Gopinath, M. and Somwaru, A. (2002) Public R & D and Infrastructure Policies: Effects on Cost of Midwestern Agriculture. In: Ball, V.E. and Norton, G.W., Eds., Agricultural Productivity: Measurement and Sources of Growth, Kluwer Academic Publishers, Boston/Dordrecht/London.
https://doi.org/10.1007/978-1-4615-0851-9_7

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