00305nam a2200121 a 450000100080000000500110000800800410001910000260006024500350008626000250012130000100014665300270015610156742019-08-21       1992    bl uuuu     u00u1 u    #d1 aBERGSMA, KATHERINE A.  aIntroduction to level5 Object.  a[s.l.]: [s.n.]c1992  a37 p.  aINVESTIGACIÓN AGRARIA