| Title: | Use of yielding steel supports (props) in combination with backfilling for mining thick, flat beds |
| Alternate title: | Anthracite mechanical-mining investigations : use of yielding steel supports (props) in combination with backfilling for mining thick, flat beds |
| Author: | Hartley, John C. |
| Author: | Brennan, Robert J. |
| Author: | Cooner, John D. |
| Note: | U.S. Dept. of the Interior, Bureau of Mines, 1956 |
| Link: | page images at HathiTrust |
| No stable link: | This is an uncurated book entry from our extended bookshelves, readable online now but without a stable link here. You should not bookmark this page, but you can request that we add this book to our curated collection, which has stable links. |
| Subject: | Anthracite coal industry |
| Subject: | Coal-mining machinery |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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