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Conterminous United States Mineral Resource Assessment Program
by Walden P. Pratt, 10 p., 1991.

Mineral Resource Appraisal
by Walden P. Pratt, 5 p., 1983.

Responses to Iben Brownings Prediction of a 1990 New Madrid- Missouri- Earthquake
by William Spence, Robert S. Herrmann, Arch C. Johnston, and Glen Reagor, 248 p., 1993.

Tecumsehs Prophecy
Edited by R.M. Hamilton and A.C. Johnston, 30 p., 1990.