http://ir.lib.ruh.ac.lk/handle/iruor/21318 Tue, 04 Aug 2026 01:20:41 GMT 2026-08-04T01:20:41Z http://ir.lib.ruh.ac.lk/handle/iruor/21329 LIM 1112: Introduction to Limnology Department of Limnology and Water Technology Tue, 01 Oct 2024 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/21329 2024-10-01T00:00:00Z