div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: USGS · floga les o SONORA Ca na nea o MEXICO MAP SHOWING DISTRIBUTION PATTERN TUNGSTEN FROM SAMPLES THE FRACTION HEAVY-MINERAL CONCENTRATES NORTHERN SONORA Tot tea Reported bal src=https:reader035vdocumentsmxreader035viewer202207121260273d8e18a79607a146089fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv