Winteringham, F. P. W. (1984). Soil and fertilizer nitrogen: Review study with particular reference to plant nutrition and environmental protection / sponsored by the Joint FAO/IAEA Division of Isotope and Radiation Applications of Atomic Energy for Food and Agricultural Development and prepared by F.P.W. Winteringham. Vienna: International Atomic Energy Agency.

Winteringham, F. P. W. Soil and Fertilizer Nitrogen: Review Study With Particular Reference to Plant Nutrition and Environmental Protection / Sponsored By the Joint FAO/IAEA Division of Isotope and Radiation Applications of Atomic Energy for Food and Agricultural Development and Prepared By F.P.W. Winteringham. Vienna: International Atomic Energy Agency, 1984.

Winteringham, F. P. W. Soil and Fertilizer Nitrogen: Review Study With Particular Reference to Plant Nutrition and Environmental Protection / Sponsored By the Joint FAO/IAEA Division of Isotope and Radiation Applications of Atomic Energy for Food and Agricultural Development and Prepared By F.P.W. Winteringham. Vienna: International Atomic Energy Agency, 1984.