Verhoeff, M. (1911). The Kentucky mountains, transportation and commerce, 1750 to 1911: A study in the economic history of a coal field. Louisville, Ky.: J. P. Morton & Co. (inc.), printers to the Filson Club.

Verhoeff, Mary. The Kentucky Mountains, Transportation and Commerce, 1750 to 1911: A Study in the Economic History of a Coal Field. Louisville, Ky.: J. P. Morton & Co. (inc.), printers to the Filson Club, 1911.

Verhoeff, Mary. The Kentucky Mountains, Transportation and Commerce, 1750 to 1911: A Study in the Economic History of a Coal Field. Louisville, Ky.: J. P. Morton & Co. (inc.), printers to the Filson Club, 1911.