Forty eighth annual sessionproceedings (48: 1992: Colombo) Sri Lanka Association for the Advancement of Science /Organised by Sri Lanka Association for the Advancement of Science,Colombo,December 1992 - Colombo Vidya Mandiraya 1992 - 114 p. ISBN: 116685 Subjects--Topical Terms: Science,Technology Dewey Class. No.: 506 / SRI