1. Aboul‐Ela I. Amer F. I.&El Bolock A. R.(1973).Studies on spawning and spawning behaviour ofClarias lazeraCuv. et Val. in fish farms of the A.R. Egypt.Bull. zool. Soc. EgyptNo. 25:25–33.
2. The plants and animals of Lake Sibaya, KwaZulu. South Africa: a checklist;Allanson B. R.;Revue Zool. afr.,1974
3. AN INTRODUCTION TO THE PHYSICS AND CHEMISTRY OF SOME LAKES IN NORTHERN ZULULAND
4. Fish fecundity and its relations with stock and recruitmenl;Bagenal T. B.;Rapp. P.-v. Réun. Cons. perm. int. Explor. Mer,1973
5. The non‐cichlid fishes of the eastward‐flowing rivers of Tanzania, East Africa;Bailey R. G.;Revue Zool. Bot. afr.,1969