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	1.	Asbestos, by M. A. Allen and G. M. Butler. by Allen, Milton Arthur, 1890- Butler, G. M. (Gurdon Montague), 1881- [joint author.] Series: University of Arizona. Bulletin ; no. 113. \| University of Arizona. Mineral technology series ; no. 24. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Tucson, Ariz., University of Arizona, Arizona bureau of mines, 1921 Availability: No items available. Add to cart (remove)
	2.	Arizona gold placers, by M.A. Allen. by Allen, Milton Arthur, 1890- Series: University of Arizona. Economic series ; no. 18. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Tucson, Ariz., Published by the University of Arizona, Arizona Bureau of Mines, 1922 Availability: No items available. Add to cart (remove)

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