00512cam a22001572  4500001001100000005001700011008004100028020002600069040001500095050001500110100003500125245010200160260003000262300001500292650004700307000000389120151217145743.0070516s        xx            000 0 eng d  a9966704949 :cKES 250  aKABUcKABU 0aQD40b.T961 aTwoli, Nicholas W.@000015411410aTeaching secondary school chemistry :ba textbook for chemistry teachers in developing countries.  aNairobi :bNehema,c2006.  aiv, 176 p. 0aChemistryxStudy and teaching.@0000154115