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2. Geochronologic data from the Arabian Shield;Aldrich;U.S. Geol. Surv. Saudi Arabian Proj. Rep., 240,1978
3. Geology of the Homogar Group of Volcanic Rocks;Ali,1979
4. Rb/Sr and U/Pb geochronology of Late Precambrian, Early Paleozoic igneous activity in the Richtersveld of Southern and South-West Africa;Allsopp;Trans. Geol. Soc. S. Afr,1979
5. The Sabaloka igneous complex, Sudan;Almond;Philos. Trans. R. Soc. London, Ser. A,1977