00631nam a2200205 a 450000100080000000500110000800800410001910000170006024501280007726000600020530000090026549000270027465000120030165000260031365000110033965000230035065000200037370000160039370000160040910397402014-02-22       1977    bl uuuu     u00u1 u    #d1 aNEWTON, J.E.  aSheep on lowland grassba comparison of masham and welsh mountain ewes for a high output sheep system on a commercial scale  aHurley (Inglaterra): Grassland Research Institutec1977  a10p.  aTechnical Report (GRI)  aCORDERO  aINDICE DE CRECIMIENTO  aOVINOS  aPESO AL NACIMIENTO  aREPRODUCTIVIDAD1 aYOUNG, N.E.1 aBETTS, J.E.