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1Kanpur, India : U.P. Society of Extrension Education & Rural Development, 1983.117 p. : ill., maps ; 25 cm.Subjects: “...Agricultural productivity India Uttar Pradesh....”
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2by Jeanplong, József
Published 1968Gödöllő : [Agrártudományi Egyetem], 1968.21 p. ; 24 cm.Subjects: “...Grasses Agricultural productivity Hungary....”
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3by Dupuis, Jacques, 1912-
Published 1957Pondichéry [India] : Imprimerie de la Mission, 1957.iv, 50 p. : ill., map (fold.) ; 25 cm.Subjects: “...Agricultural productivity India....”