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 | V. Balasubramanian, J.K. Ladha, G.L. Denning, International Rice Research Institute - 1999 - 384 páginas
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 | International Development Research Centre (Canada) - 1998 - 319 páginas
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AAA (1971) Preliminary trials on the intercropping of maize with different tropical legumes in Western Nigeria. J. Agric. Sci. 