1. Berger, F. (no date) Dichtetabelle für natürliche Wässer. Lunz/See (unpublished).
2. Biswas, S. 1966. Ecological studies of phytoplankton in the newly forming Volta Lake of Ghana J. W. Afr. Sc. Ass., 11, 14–19.
3. Biswas, S. 1969a. Thermal changes in the Volta Lake at Ajena In ‘Man-Made Lakes: The Accra Symposium’, edited by L. E. Obeng, Ghana Universities Press, Accra, 103–109.
4. Biswas, S. 1969b. The Volta Lake: Some ecological observations on the phytoplankton. Verh. Internat. Verein. Limnol., 17, 259–272.
5. Biswas, S. 1972. Distribution of phytoplankton during the early development of Volta Lake (1964–1968). Hydrobiologia, 40, 201–207.