1. Harbaugh, J. W., and Demirmen, F., 1964, Application of factor analysis to petrologic variations of Americus Limestone (Lower Permian), Kansas and Oklahoma: Kansas Geol. Survey Sp. Dist. Publ. 15, 40 p.
2. Harman, H. H., 1967, Modern factor analysis (2nd ed.): Univ. of Chicago Press, Chicago, 474 p.
3. Imbrie, J., and Kipp, N. G., 1970, A new micropaleontological method for quantitative paleoclimatology: application to a late Pleistocene Caribbean core,in The Late Cenozoic glacial ages: Yale Univ. Press, New Haven, in press.
4. Imbrie, J., and Purdy, E. G., 1962, Classification of modern Bahamian carbonate sediments: Am. Assoc. Petroleum Geologists Mem. 1, p. 253–272.
5. Imbrie, J., and Van Andel, T. H., 1964, Vector analysis of heavy-mineral data: Geol. Soc. America Bull., v. 75, no. 11, p. 1131–1156.