Sri Lanka association for the advancement of science
Proceedings of the forty-second annual session-partII: December 1986 - Colombo Sri Lanka association for the advancement of science 1987 - 59 p.
507.2 / SRI
Proceedings of the forty-second annual session-partII: December 1986 - Colombo Sri Lanka association for the advancement of science 1987 - 59 p.
507.2 / SRI