Proceedings of the 55th annual session : 29 November - 03 December, 1999. /((ed. by) W.K. Hirimbruegama - Colombo Sri Lanka association for the advancement of science 2005 - 2v. (v.1-iv, 263; v.2-118 p.) Contents: v.1- Abstracts; v.2-Presidentia; addresses & invited lectures ISBN: 1391023X Subjects--Topical Terms: Science-Research-Conference-Proceedings Dewey Class. No.: 507.2 / ANN