File:Portrait of Alvah Powell in 1922.jpg
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| Description |
English: Portrait of Alvah Powell in 1922, from his book Powell Leverage Cycle published that year. |
| Date | |
| Source |
Original publication: Powell Leverage Cycle by Alvah L. Powell. Sudwarth Co., Washington DC, 1922 |
| Author |
Alvah Powell |
|
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. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:53, 29 May 2013 | | 278 × 368 (29 KB) | ChrisPowell13 | {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|Portrait of Alvah Powell in 1922, from his book Powell Leverage Cycle published that year.}} |Source = '''Original publication''': Powell Leverage Cycle by Alvah L. Powell. Sud... |
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