FITTON, J.G. 1987. The Cameroon line, West Africa: a comparison between oceanic and continental alkaline volcanism. In J.G. Fitton and B.G.J. Upton (eds), Alkaline igneous rocks. 273-91. Geological Society of London Special Publication 30.FITTON, J.G. and

FITTON, J.G. 1987. The Cameroon line, West Africa: a comparison between oceanic and continental alkaline volcanism. In J.G. Fitton and B.G.J. Upton (eds), Alkaline igneous rocks. 273-91. Geological Society of London Special Publication 30.FITTON, J.G. and DUNLOP, H.M. 1985. The Cameroon line, West Africa, and its bearing on the origin of oceanic and continental alkali basalt. Earth and Planetary Science Letters, 72: 23-38.FITTON, J.G. and HUGHES, D.J. 1981. Strontian melilite in a nephelinite lava from Etinde, Cameroon. Mineralogical Magazine, 44: 261-4GÈZE, B. 1943. Géographie physique et géologie du Cameroun occidental. Mémoires du Muséum National d'Histoire Naturelle. Paris, N.S. 17: 1-271.JÉRÉMINE , E. 1943. Contribution a l'ètude pétrographique du Cameroun Occidental. Mémoires du Muséum National d'Histoire Naturelle. Paris, NS 17: 273-320.LACROIX, A. 1923. Minéralogie de Madagascar. 3. Lithologie Appendice - Index Geographique. Société d’Éditions Géographiques, Maritimes et Coloniales, Paris. 450 pp.NKOUMBOU, C., DERUELLE, B. and VELDE, D. 1995. Petrology of Mt. Etinde nephelinite series. Journal of Petrology, 36: 373-95.SMITH, A.L. 1970. Sphene, perovskite and coexisting Fe-Ti oxide minerals. American Mineralogist, 55: 264-9.TILLEY, C.E. 1953. The nephelinite of Etinde, Cameroons, West Africa, Geological Magazine, 90, 145-151.