00532nam a2200181 a 450000100080000000500110000800800410001910000160006024501290007626000230020565000240022865300200025265300070027265300200027970000180029970000170031770000160033420399492024-04-05       2015    bl uuuu     u00u1 u    #d1 aKERN, E. L.  aSurvival analysis of productive life in Brazilian Holstein using a Weibull proportional hazard model.h[electronic resource]  aWarsaw: EAAPc2015  agenetic improvement  aHolstein cattle  aPL  aProductive life1 aCOBUCI, J. A.1 aCOSTA, C. N.1 aDUCROCQ, V.