49769document2283DTM_254_-_KONSEP-KONSEP_KIMIA_FIZIK_JUN_1995.pdfapplication/pdf1250362013-07-13 00:46:08http://eprints.usm.my/1564/1/DTM_254_-_KONSEP-KONSEP_KIMIA_FIZIK_JUN_1995.pdf