1. Association of rubidium and potassium and their abundance in common igneous rocks and meteorites;Ahrens;Geochim. Cosmochim. Acta,1952
2. Strontium in plagioclase feldspars from four layered basic masses in Somalia;Butler;Mineral. Mag.,1962
3. Trace elements geochemistry of the Louis Lake batholith of early Precambrian age, Wyoming;Condie;Geochim. Cosmochim. Acta,1971
4. On the rapakivi granite in contact with the biotite granite, Drammen, Norway;El Bouseily;Bull. Fac. Sci., Alexandria Univ.,1973
5. Geological studies of the Drammen granite, Oslo region, Norway — Part II, Geochemistry;El Bouseily;Bull. Fac. Sci., Alexandria Univ.,1972