1. Pliocene and Pleistocene Foraminifera from Southern California;Bagg;U.S. Geol. Surv., Prof. Paper,1912
2. Eocene Foraminifera from the Cowlitz River area of Lewis County, Washington;Beck;Journ. Paleont.,1943
3. Report on the scientific results of the voyage of H.M.S. ‘Challenger’ during the years 1873-1876. Vol. 9 (Zool.): Foraminifera;Brady,1884
4. The Foraminifera, their classification and economic use;Cushman,1948
5. et seq. A catalogue of Foraminifera;Ellis;Amer. Mus. Nat. Hist. Publ.,1940