Crass R.S.

idbiblio	auteurs	support	annee	ext.	pages
The indigenous fishes of Natal. Publication du Conseil Scientifique pour l'Afrique (CSA) au sud du Sahara, 25
3262	Crass R.S.	Report	1956	#	89.
Tilapia in Natal. Proceedings of the First Fisheries Day in Southern Rhodesia
3659	Crass R.S.	Symposium, congress...	1959	#	29-31.
The status and identity of Barbus marequensis A. Smith, 1841 (Pisces, Cyprinidae). Annals and Magazine of Natural History, 13 (1)
3691	Greenwood P.H., Crass R.S.	Journal	1959	#	810-814.
Notes on the freshwater fishes of Natal with descriptions of four new species. Annals of the Natal Museum, 14 (3)
3860	Crass R.S.	Journal	1960	b	405-458,4 fig.
Biological notes on the acclimatization of trout in Natal. South African Journal of Science, 56
3861	Crass R.S.	Journal	1960	a	147-151.
Freshwater fishes of Natal. Pietermaritzburg, Shuter and Shooter
4509	Crass R.S.	Book	1964	#	167 p.,35 fig.,6 pl.
Features of freshwater fish distribution in Natal and discussion of controlling factors. Limnological Society of Southern Africa : newsletter, 2
4851	Crass R.S.	Journal	1966	a	31-35,9 fig.
Freshwater fish families. Limnological Society of Southern Africa : newsletter, 2
4852	Crass R.S.	Journal	1966	b	16-25.
Freshwater fish in Natal. Natal Wildlife, 9 (1)
5209	Crass R.S.	Journal	1968	#	10-12,fig.
The effects of land use on freshwater fish in South Africa, with particular reference to Natal. Hydrobiologia, 34 (1)
5420	Crass R.S.	Journal	1969	#	38-56.