The valuation of public coal lands
Subtitle: The value of coal land
By: by George H. Ashley.  Depth and minimum thickness of beds as limiting factors in valuation / by Cassius A. Fisher.
Contributors: Fisher, Cassius A. 1872-1930.
Series: United States.  Geological Survey.  Bulletin -- 424; Geological Survey bulletin -- 424.
Publisher: Government Printing Office
Published: 1910
Place of publication: Washington
Language: eng
Number of pages: 75
Subjects: Coal; Coal mines and mining
Other titles: Value of coal land.; Depth and minimum thickness of beds as limiting factors in valuation.