http://repo.statistics.gov.lk/handle/1/237 Thu, 12 Mar 2026 14:20:04 GMT 2026-03-12T14:20:04Z http://repo.statistics.gov.lk/handle/1/854 Reference notes on statistical methods and applications Department of, Census and Statistics Mon, 01 Jan 1990 00:00:00 GMT http://repo.statistics.gov.lk/handle/1/854 1990-01-01T00:00:00Z http://repo.statistics.gov.lk/handle/1/853 මුලික ගණිතය සහ සංඛ්‍යානය සටහන් Department of, Census and Statistics Fri, 21 Mar 1986 00:00:00 GMT http://repo.statistics.gov.lk/handle/1/853 1986-03-21T00:00:00Z http://repo.statistics.gov.lk/handle/1/238 A Guide to Statistics Department of Census and Statistics Sun, 01 Sep 2002 00:00:00 GMT http://repo.statistics.gov.lk/handle/1/238 2002-09-01T00:00:00Z