00267nam a2200121Ia 4500008004100000082000800041082001000049100002500059245002000084260001100104260002100115260000900136230118s9999||||xx |||||||||||||| ||und||  a540  bGOP/B  ak.a bgopalakrishnan 0abasic chemistry  acochin  bayodhya printers  c1987