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| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 108, 178 Sheppard, R.A. (1971), Clinoptilolite, of possible economic value in sedimentary deposits of the conterminous United States, USGS Bull. 1332-B: B1-B15. Wrucke, C.T. (1961), Paleozoic and Cenozoic rocks in the Alpine-Nutrioso area, Apache Co., AZ, USGS Bull. 1121-H |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 178 Sheppard, R.A. (1971), Clinoptilolite, of possible economic value in sedimentary deposits of the conterminous United States, USGS Bull. 1332-B: B1-B15. Sheppard, R.A. (1969), Zeolites, in Mineral and water resources of AZ, AZ Bur. Mines Bull. 180: 464-467 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |