Protein and non-protein nitrogen for ruminants : proceedings of the Symposium on Recent Developments in the Use of New Sources of Protein, Essential Amino Acids, and Non-protein Nitrogen, with Special Reference to Ruminants, organized by the Committee on Agricultural Problems of the United Nations Economic Commission for Europe and the Food and Agriculture Organization of the United Nations, Geneva, 10-13 January 1977.
Published: (1977)
