| Title: | Milling methods and costs at the lead concentrator of the Hecla Mining Co., Gem, Idaho |
| Author: | Zeigler, William Le Verne, 1891- |
| Author: | United States. Bureau of Mines |
| Note: | Dept. of Commerce, U.S. Bureau of Mines, 1932 |
| 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: | Hecla Mining Company |
| Subject: | Lead ores -- Gem (Idaho) |
| Subject: | Ore-dressing |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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