000			00327nam a2200157 a 4500
020			_a9971418207
082			_a540 CHE
100	1		_aCheng,Tong Wai
245	1	0	_aChemistry for O Level
250			_a2nd.ed
260			_aHong Kong _bFederal _c1982
300			_a77p
490	1		_aSI Units
650			_achemistry
942			_cBK
999			_c1065 _d1065