Ceylon Association for the Advancement of Science (25th: 1
Proceedings of the twenty fifth annual session - 96Colombo Ceylon Association for the Advancement of Science 1969 - 107-262 p.
Science
500 / CEY
Proceedings of the twenty fifth annual session - 96Colombo Ceylon Association for the Advancement of Science 1969 - 107-262 p.
Science
500 / CEY