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Sri Lanka Association for the Advancement of Science

By ANNUAL session proceedings. Colombo Vidya Mandiraya 1990 . 192 p. 167488

By ANNUAL session proceedings (37: 1981: Colombo). Colombo Vidya Mandiraya 1982 . 93 p. 161937

By ANNUAL session proceedings (44: 1988: Colombo). Colombo Vidya Mandiraya 1988 . 242 p. 167485

By ANNUAL session proceedings (45: 1989: Colombo). Colombo Vidya Mandiraya 1990 . 139 p. 167489