1. Progress in research on breeding behaviour of commercial important fish species;Badenhausen,1965
2. Ecology, Individuals, Population and Communities;Begon,1990
3. The Fishes of Zimbabwe;Bell-Cross,1988
4. Studies on the biology of the genus Synodontis at Khartoum. Age and Growth;Bishai;Hydrobiologia,1965
5. Studies on the biology of the genus Synodontis at Khartoum. Food and Feeding habits;Bishai;Hydrobiologia,1965