Nitrogen in the environment. Vol 2 Soil-plant-nitrogen relationships - Donald R. Nielsen; J. G. MacDonald (New York Academic Press, 1978)
Donald R. Nielsen & J. G. MacDonald: Nitrogen in the environment. Vol 2 Soil-plant-nitrogen relationships. New York. Academic Press, 1978. 0-12-518402-6--(589.95NIE)
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