Handbook--standard and approved American coal mining methods--practice--equipment.

By American Mining Congress..
[Washington, D.C., 1927 .
2 p. l., [293] p. , Cover-title. | Loose leaves. | Part of the plates, diagrams, and tables are numbered as 1 page. | Paged at foot A-1 to A-28, 1 leaf, B-1 to B-51, etc. | "Published by the American Mining Congress ... Washington, D. C., under the supervision of its National Standarization Division, Coal Mining Branch." 18 cm..

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Report of proceedings of the sixth annual session /

Portland OR : Union printing company, 1904 .
210p. ; , Includes list of members & delegates present. 22cm..

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Handbook--standard and approved American coal mining methods--practice--equipment.

Report of proceedings of the sixth annual session /