TY - RPRT TI - Maps showing anomalous concentrations of lead, molybdenum, bismuth, and tungsten in stream sediment and heavy-mineral concentrate from parts of the Ajo and Lukeville 1 degree by 2 degrees quadrangles, Arizona AU - P. K. Theobald AU - H. N. Barton PY - 1988 DO - 10.3133/mf1834d UR - https://pubs.usgs.gov/publication/mf1834D ID - mf1834D ER -