http://ir.lib.ruh.ac.lk/handle/iruor/18742 CHE 1112 Sun, 10 May 2026 00:32:38 GMT 2026-05-10T00:32:38Z http://ir.lib.ruh.ac.lk/handle/iruor/12163 CHE 1112 - General Chemistry and Basic Concepts in Analytical Chemistry Department of Chemistry Sun, 01 Nov 2020 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/12163 2020-11-01T00:00:00Z