Ecological and limnological study on lake Tanganyika and its adjacent regions : IX
: [this work was partly supported by Grant-in-Aid for overseas scientific research
(Nos 04041078, 04044088) and for scientific research on priority area (#319) from
the Japan ministry of education, science and culture] / edited by Yasunobu Yanagisawa
& Hiroya Kawanabe, 1995