Dixey. F. 1944 “African Landscape” Geog. Review, 1944. Vol 34.

Furon. R. 1960 “Geologie de l’Afrique” Paris.

Gregory, J. W. 1921 “The Rift Valleys and the Geology of East Africa” London.

Hening. E., 1938 “Afrika” in “Regionale Geologie der Erde”. hg. Von K. Andrée, H. A. Brouwer, V. W. H. Bucher. Leipzig.

King. L. C. 1951 “South African Scenery” London.

King. L. C. 1962 “The Morphology of the Earth” London.

Krenkel, E., 1925-1933 “Geologie Afrikas” Bd. I. II. III. Berlin.

Maurette, F., 1939 “Afrique equatoriale, Orientale et australe” Tom. XII, Gaographie Universelle. Paris.

Wegener, A., 1922. “The Origin of Continents and Oceane” London.

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