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Robert Lenon

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It Seems Like Only Yesterday: Mining and Mapping in Arizona's First Century Vol 1: The Yuma Years
Western Mining An Informal Account of Precious-metals Prospecting, Placering, Lode Mining, and Milling on the American Frontier from Spanish Times to 1893
It Seems Like Only Yesterday Mining and Mapping in Arizona's First Century Vol 2: Bisbee and Patagonia
It Seems Like Only Yesterday Mining and Mapping in Arizona's First Century Vol 2: Bisbee and Patagonia
Black Powder and Hand Steel Miners and Machines on the Old Western Frontier
Western Mining An Informal Account of Precious-Metals Prospecting, Placering, Lode Mining, and Milling on the American Frontier from Spanish Times to 1893