| Source: The Printing Trades Magazine, 1909-1915 (incomplete run) Location: St.L. / 05 / P936 | |
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| Last Name: | Pfeiffer |
| First Name: | John |
| Middle Name: | M. |
| Death Year: | 1914 Mar. 6 |
| Volume: | VI |
| Issue: | 4 |
| Date of Publication: | April, 1914 |
| Page: | 10 |
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