| Title: | Development of a rotary test drill |
| Author: | Wright, Fred D. |
| Author: | Brackel, Lewis H. |
| Note: | U.S. Dept. of the Interior, Bureau of Mines, 1952 |
| 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: | Drilling and boring |
| Subject: | Mineral industries |
| Subject: | Mines and mineral resources |
| Subject: | Mining engineering |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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