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| | Geological Sciences at Arizona State University : Stanley N. Williams (Site not responding. Last check: 2007-10-20) |
 | | Williams, S. N., Sturchio, N. C., Calvache V., M. L., Mendez F., R., Londo—o C., A, and Garc’a P., N., 1990, Sulfur dioxide flux from Nevado del Ruiz volcano, Colombia: total flux and isotopic constraints on its origin: Jour.Volcanol. |
 | | Williams, S. N., Stoiber, R. E., Garc’a P., N., Londo—o C., A., Gemmell, J. B., Lowe, D. R., and Connor, C. B., 1986, Eruption of Nevado del Ruiz, Colombia November 13, 1985 : gas flux and fluid geochemistry: Science, v. |
 | | Williams, S. N., 1985, Soil Rn and Hgo distribution and relation to magmatic resurgence at Long Valley Caldera, California: Science, v. |
| geology.asu.edu /people/faculty/williams/index.html (2207 words) |
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