The valuation of public coal lands
著者
書誌事項
The valuation of public coal lands
（Bulletin / Department of the Interior, United States Geological Survey, 424）
U.S. Government Printing Office, 1910
- : pbk
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注記
Includes bibliographical references
HTTP:URL=http://pubs.usgs.gov/bul/0424/report.pdf
収録内容
- The value of coal land / by George H. Ashley
- Depth and minimum thickness of beds as limiting factors in valuation / by Cassius A. Fisher