TY - RPRT TI - Geochemical variability of natural soils and reclaimed mine-spoil soils in the San Juan Basin, New Mexico AU - L. P. Gough AU - R. C. Severson PY - 1981 DO - 10.3133/pp1134c UR - https://pubs.usgs.gov/publication/pp1134C ID - pp1134C ER -