Neglected Fe3+/Fe2+ ratios -- A study of Fe3+ content of megacrysts from alkali basalts
McGuire, A.V., Dyar, M.D., and Ward, K.A., 1989, Neglected Fe3+/Fe2+ ratios -- A study of Fe3+ content of megacrysts from alkali basalts: Geology, v. 17, no. 8, p. 687-690.