Mineral resource assessment maps of the Harrison 1° x 2° quadrangle, Missouri and Arkansas - Pratt, W. P.; Hayes, T.; Erickson, R.; Kisvarsanyi, E.; McFarland, M.C.; Rueff, A. W.; Bush, W.; Colton, G.; McFarland, J.D. (Miscellaneous Field Studies Map, 1993)