Time almanac 2008
Agnew, A.F., and Tychsen, P.C., 1965, A guide to the stratigraphy of South Dakota, ... Chicago and Northwestern Railway Company, 1912, The Black Hills, South ... Hodson, W.G., 1974, Records of water wells, springs, oil- and gas-test holes, and ... U52/no.2]. Schnabel, R.W., 1956, The geology and uranium deposits of the ...