1. The Minerals of Bentonite and Related Clays and their Physical Properties;Amer. Ceramic Soc. Journ.,1926
2. A Critical Examination of Stricklandia (= Stricklandinia) lirata (J. de C. Sowerby), 1839, forma typica;GEOL. MAG.,1935
3. See Spence S. , "Bentonite" Mines Branch, Dept. of Mines, Canada, 1924, pp. 1-36, 13 plates
4. and C. W. Davies, "Bentonite, Its Properties, Mining, and Utilization," Technical Paper 438, Bureau of Mines, U.S. Dept. of Commerce, 1928, pp. 1-51.