00421nam a22001457a 4500008004100000020001400041050002000055100002400075245004800099250001300147260004900160300001900209440003300228650001400261150530b        xxu||||| |||| 00| 0 eng d  a435644246  aQD 33 .H62 1977  aHolderness A.d1977  aA new certificate chemistry/cHolderness A.  afifth ed  aLondon:bHeinemann educational books,c1977.  av,518p.bindex  aA new certificate chemistry/  achemistry