The author is a former geologist and environmental specialist with a special interest in history. The subjects he has chosen to address are the history of the Civilian Conservation Corps and biogra...lihat lebih banyakThe author is a former geologist and environmental specialist with a special interest in history. The subjects he has chosen to address are the history of the Civilian Conservation Corps and biographical sketches of important mining figures in the history of the Western United States.lihat lebih sedikit