00398nam a2200109Ia 450000500170000000800410001705000200005810000260007824501450010426000290024965000100027820251229175643.0251229s9999    xx            000 0 und d  a SB 191 .W5M93   aMwangi, Henry Gachuna 0aEffects of phosphorus and copper on the performance of Wheat (Triticum aestivuml) genotypes  in copper deficient soilscHenry Gachuna Mwangi  aEgerton Universityb2004  aWheat