ANNUAL session proceedings (45: 1989: Colombo)
Sri Lanka Association for the Advancement of Science - Colombo Vidya Mandiraya 1990 - 139 p.
167489
Science,Technology
500 / ANN
Sri Lanka Association for the Advancement of Science - Colombo Vidya Mandiraya 1990 - 139 p.
167489
Science,Technology
500 / ANN