The sampling of coal in the mine, by Joseph A. Holmes.
|Main Author:||Holmes, J. A. 1859-1915.|
Washington, Govt. Print. Off., 1918.
[Rev. ed., July, 1918]
Revised edition. July, 1918. First edition issued, May, 1911. cf. verso of t.-p.
At head of title: ... Department of the interior. Franklin K. Lane, secretary. Bureau of mines. Van. H. Manning, director.
22 p. incl. 1 illus., forms.
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