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The 5 references without a DOI — listed, not checked
no DOI — not checkedDiallo “Comparative Analysis of Capital Intensive and Labor Intensive Rice Irrigation Perimeters in the Senegal River Basin ” thesis presented to Michigan State University at East Lansing Mich. in 1980 in partial fulfillment of the requirements for the degree of Master of Science.
no DOI — not checkedDoorenbos J. and Kassam A. H. “Yield Response to Water ” Irrigation and Drainage Paper 24 FAO (Food and Agriculture Organization of the United Nations) 1979 193 pp.
no DOI — not checkedDoorenbos J. and Pruitt W. O. “Crop Water Requirements ” FAO Irrigation and Drainage Paper 24 FAO Rome 1977 144 pp.
no DOI — not checkedEvans L. T. ed. “Crop Physiology ” Cambridge University Press New York N.Y. 1978.
no DOI — not checkedHargreaves G. L. “Water Requirements and Agricultural Benefits for the Senegal River Basin ” thesis presented to Utah State University at Logan Utah in 1983 in partial fulfillment of the requirements for the degree of Master of Science.
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