TY - RPRT TI - Pleistocene apparent ages by U-Pb isotope and U-series methods for uranium ore in Dakota Sandstone near Gallup, New Mexico AU - K. A. Ludwig AU - Barney J. Szabo AU - Harry C. Granger PY - 1977 UR - https://pubs.usgs.gov/publication/70233483 ID - 70233483 ER -