Labor standards and metal mining; a study of the effects of the Fair labor standards act of 1938 on the non-ferrous metal mining industry - Ertl, Tell 1914-; Read, Thomas Thornton 1880-1947. (New York King's Crown Press, 1947)
T. Ertl's thesis--Columbia Univ.
Pub. also without thesis statement
Vita.
Keywords: Mines and mineral resources -- United States