Cole, W. (1957). Larger Foraminifera. In Johnson, J. H.; Bramlette, M.; Riedel, W.; Todd, R.; Cole, W.; Cooke, C.Geology of Saipan, Mariana Islands; Part 3, Paleontology. United States Geological Survey Professional Papers. 280 I: 321-360.
Larger Foraminifera. In Johnson, J. H.; Bramlette, M.; Riedel, W.; Todd, R.; Cole, W.; Cooke, C.Geology of Saipan, Mariana Islands; Part 3, Paleontology
United States Geological Survey Professional Papers