TY - RPRT TI - Maps showing anomalous concentrations of zinc, silver, antimony, manganese, barium and strontium 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/mf1834e UR - https://pubs.usgs.gov/publication/mf1834E ID - mf1834E ER -