1. Clay illuviation in calcareous soils;Aguilar,1983
2. Micromorphology of paleosols from the semiarid southern High Plains of Texas;Allen,1974
3. Organic carbon;Allison,1965
4. Calcic soils and calcretes in the southwestern United States;Bachman;U.S. Geol. Survey, Open File rpt.,1977
5. Pedogenic degradation of sepiolite and palygorskite on the Texas High Plains;Bigham;Soil Sci. Soc. America J.,1980