	*(1990) Preliminary mineral resource assessment of the Tucson and Nogales 1 degree x 2 degrees quadrangles, Arizona. Open-File Report* Vol. 1990 (90-276) US Geological Survey doi:10.3133/ofr90276**	Report (issue)
	OF THE TUCSON AND NOGALES 1° by 2° QUADRANGLES, ARIZONA Edited by Jocelyn A. Peterson Open-File Report.................................. Titaniferous magnetite in alluvium.....................................Gray-scale contour maps of element distribution in Arizona, scale 1:3,500,000: 19. Uranium .................and Nogales 1 by 2 quadrangles in south-central Arizona have made important economic contributions to a...of copper, and 10 percent of gold production in Arizona; most of this came from porphyry copper systems
	*Keiser, H. D. - Ed.* (1941) Review of 1940. Minerals Yearbook. Bureau of Mines**	Report (volume)
	................. _ ........ short tons.. IOJ Titanium ore: Ilmenite •..•••...........•........•....... Alaska ...... -·-·· .... -·----·--· ..... .. Arizona. ____ -·----------··-·--· -- .. .. Arkansas. ____...Asbeotos •••••.••••••...................... Yermont, Arizona, Goorgis and Xorth Carolino, )!aryland ..• nrn:ont...concentrates. Pennsyl,ania, Illinois, Tennessee, .Arizona ......... -·•·····-·· M 62 California, Kamas...·-······-···· Arizona, Colorado, Utab. ____________________________________ _ Colorado, Utah, Arizona. 73 Yermiculit

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Titanium-bearing Magnetite from Gila County, Arizona, USA