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Transforming traditionally : land and labor use in agriculture in Asia and Africa
Nair, Kusum, (1983)
Smaller farmlands can yield more. Raising agricultural productivity by technological change
(1969)
Otnošenieto kǔm zemjata kato nacionalno bogatstvo i intenzifikacijata na selskostopanskoto proizvodstvo
Slavev, Slavčo, (1982)
New aspects of land fertility improvement
Dhar, N. R., (1973)
Die Duengung des Bodens bei trockenem Klima : Indien : F. I. T. A., 3. Internationale Kunstduenger - Konferenz, Bern - 9. und 10. November 1934
Dhar, N. R., (1934)
Publication / National Academy of Sciences