%A Research Co-ordination Meeting and Panel on Tracer Techniques in Studies on the Use of Non-Protein Nitrogen (NPN) in Ruminants (1974 : Vienna) %A Joint FAO-IAEA Division of Atomic Energy in Food and Agriculture %T Tracer studies on non-protein nitrogen for ruminants III : proceedings of a Research Co-ordination Meeting on Tracer Techniques in Studies on the Use of Non-protein Nitrogen (NPN) in Ruminants %I International Atomic Energy Agency %D 1976 %S Panel proceedings series / International Atomic Energy Agency %V %U http://ci.nii.ac.jp/ncid/BA22371644