00514naa a2200181 a 450000100080000000500110000800800410001910000200006024500570008026000090013765000140014665000260016065300250018665300250021165300230023665300140025977300590027313691481998-05-20       1978    bl ---       0--  u    #d1 aFITZHUGH, H. A.  aBioeconomic analysis of ruminant production systems.  c1978  aRuminante  aSistema de Produção  aAnalise bioeconomica  aBioeconomic analysis  aProduction systems  aRiuminant  tJournal of Animal Sciencegv.46, n.3, p.797-806, 1978.