The case of bituminous coal - Hamilton, Walton Hale 1881-; Wright, Helen Russell; Insititute of economics, Washington, D. C. (New York The Macmillan company, 1926)
"The Institute of economics has undertaken a series of studies on coal of which this volume is the second."--Director's pref.
Keywords: Bituminous coal; Coal trade -- U. S; Coal mines and mining -- U. S