1. Aguilera, N. H., and M. L. Jackson, 1959. Iron oxide removal from soils and clays. Soil Sci. Soc. Am. Proc. 17:359.
2. —, 1960. Iron oxide removal from soil and clays. Soil Sci. Soc. Am. Proc. 18:223.
3. Aguilera, N. H., and M. L. Jackson, 1960. Iron oxide removal from soil and clays. Soil Sci. Soc. Am. Proc. 18:350.
4. Alexander, L. T., S. B. Hendricks, and R. A. Nelson, 1939. Minerals in soil colloids II. Soil Sci. 48:273.
5. Alexanian, C., and R. Wey, 1951. Existence of a strong 32 Å line in oriented montmorillonite plates. Compt. Rend. 232:1855.