WILLIS, J.C. A revised catalogue of the indigenous flowering plants and ferns of Ceylon / by J.C.Willis - Dehra Dun Mys Bishen Singh Mahtndara Pal Singh 1978 - 188 p.- - Peradeniya manuals of botany, entomology, agriculture, and h . Includes index. ISBN: 61328 Dewey Class. No.: 582.13 / WIL