Sloane, H. N., & Sloane, L. L. (1970). A pictorial history of American mining: The adventure and drama of finding and extracting nature's wealth from the earth, from pre-Columbian times to the present. New York: Crown Publishers.

Sloane, Howard N., and Lucille L. Sloane. A Pictorial History of American Mining: The Adventure and Drama of Finding and Extracting Nature's Wealth From the Earth, From Pre-Columbian Times to the Present. New York: Crown Publishers, 1970.

Sloane, Howard N., and Lucille L. Sloane. A Pictorial History of American Mining: The Adventure and Drama of Finding and Extracting Nature's Wealth From the Earth, From Pre-Columbian Times to the Present. New York: Crown Publishers, 1970.