1. Irvine, F. (personal communication).
2. Burkill, I. H., A Dictionary of Economic Products of the Malay Peninsula (Pub. Crown Agents for the Colonies, London, 1935).
3. Gillman, J., Gilbert, C., Gillman, T., and Spence, I., Amer. J. Dig. Dis., 19, 201 (1952).