00483naa a2200193 a 450000100080000000500110000800800410001910000190006024500520007926000090013165000140014065000100015465000130016465000100017765000260018765300100021365300250022377300410024813697071998-06-25       1980    bl ---       0--  u    #d1 aMICHALK, D. L.  aProduction systems on Australian sheep ranches.  c1980  aAustralia  asheep  aCarneiro  aOvino  aSistema de Produção  aOvine  aReproduction systems  tRangelandsgv.2, n.1, p.11-14, 1980.