Bingham, J.M., 1973. The pedogenesic alternation of aciculas clay minerals on the semi-arid Texas High plain. M.S. thesis Texas Tech Univesity, Lubbock.
Dixon, J. B. and Weed. S. B., 1989. Minerals in soil environment. Second Edition. Soil Science Society of America, Maduson, Wisconsin, USA.
Crim, R.E., 1968. Clay Mineralogy. Mc Graw-Hill Book Company.
Heim, D., 1990. Ton und Tonminerale, Enke Verlag. Stuttgart.
Millot, G., 1970. Geology of Clays. Springer, New york, Heidelberg, Berlin.
Tributh, H. und Lagaly, G., 1989. Identification und Charkterisierung von Tonminerlen. Tagung der Deutschen Ton- und Tonmineralgruppe. Giessen und Schloss Rauischholzhausen, 10-12 Mai 1989.
Vander Heuvel, R.C., 1966. The occurrence of sepiolite and attapulgite in the calcareous zone of a soil near-Lascruses, New Mexico. Clays, clayminer. 13:193-207.
