The Conterminous United States Mineral-Resource Assessment ProgramWalden P. Pratt · First published 1991 · Latest edition 1997Open the Tome
Regional potential of selected Paleozoic carbonate units in the northern midcontinent for undiscovered Mississippi Valley-type depositsWalden P. Pratt · First published 1995Open the Tome
The Midcontinent Strategic and Critical Minerals ProjectWalden P. Pratt · First published 1995Open the Tome
Geology and mineral-resource assessment of the Springfield 1⁰ x 2⁰ quadrangle, Missouri, as appraised in September 1985James A. Martin, Walden P. Pratt · First published 1991Open the Tome
U.S. Geological Survey-Missouri Geological Survey symposiumWalden P. Pratt, Martin B. Goldhaber · First published 1990Open the Tome
Metallic mineral-resource potential of the Rolla 1x̊2 ̊quadrangle, Missouri, as appraised in September 1980Walden P. Pratt · First published 1981Open the Tome
United States mineral resourcesDonald Albert Brobst, Walden P. Pratt · First published 1973Open the Tome
Geology of the Hurley West quadrangle, Grant County, New MexicoWalden P. Pratt · First published 1967Open the Tome
