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200 1 $aGeneration and diffusion of agricoltural innovations$ethe role of institutiona l factors$fedited by Iftikhar Ahmed and Vernon W. Ruttan
210   $aAlderston$cGower$d1988 - XXV$d471 p. ; 23 cm
606   $aInnovazione tecnologica$xAgricoltura$2FI
620   $dAldershot
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700  1$aAHMED,$bIftikhar$088777
701  1$aRUTTAN,$bVernon W.$079830
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996   $aGeneration and diffusion of agricoltural innovations$91142914
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