http://ir.lib.ruh.ac.lk/handle/iruor/21202 Wed, 19 Aug 2026 14:13:08 GMT 2026-08-19T14:13:08Z http://ir.lib.ruh.ac.lk/handle/iruor/21342 LIM 3252: Groundwater Exploration and Extraction Department of Limnology and Water Technology Tue, 01 Oct 2024 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/21342 2024-10-01T00:00:00Z http://ir.lib.ruh.ac.lk/handle/iruor/21220 LIM 3252: Groundwater Exploration and Extraction Department of Limnology and Water Technology Tue, 01 Apr 2025 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/21220 2025-04-01T00:00:00Z