http://ir.lib.ruh.ac.lk/handle/iruor/21264 Tue, 04 Aug 2026 01:19:54 GMT 2026-08-04T01:19:54Z http://ir.lib.ruh.ac.lk/handle/iruor/21281 OCG 1141: Mathematics Department of Oceanography and Marine Geology Fri, 01 Nov 2024 00:00:00 GMT http://ir.lib.ruh.ac.lk/handle/iruor/21281 2024-11-01T00:00:00Z