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File:Collier's 1921 Michigan - regrinding copper.jpg

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Description
English: Interior of a plant for regrinding copper in the copper district of Michigan.
Date
Source Collier's New Encyclopedia, v. 6, 1921, between pp. 260 and 261 (2nd plate).
Author Ewing Galloway
Permission
(Reusing this file)
Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Collier%27s_1921_Michigan_-_regrinding_copper.jpg

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current15:17, 18 April 2013Thumbnail for version as of 15:17, 18 April 20131,835 × 2,796 (920 KB)Bob Burkhardt{{Information |Description={{en|Interior of a plant for regrinding copper in the copper district of Michigan.}} |Source=''Collier's New Encyclopedia'', v. 6, 1921, between pp. 260 and 261 (1st plate). |Date=1921 |Author=Ewing Galloway |Permission={{PD-...

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