OPEN university of Sri Lanka Seniviratne, A.S. Foundation course level one: botany-1 block 3 / by A.S.Seniviratne; edited by P.J.Paulraj - Nugegoda The Open University of Sri Lanka 1992 - 95 p. ISBN: 9552300320 Subjects--Topical Terms: Botany Dewey Class. No.: 580 / OPE