| Source: The Printing Trades Magazine, 1909-1915 (incomplete run) Location: St.L. / 05 / P936 | |
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| Last Name: | Mock |
| First Name: | Al |
| Title: | Prof. |
| Volume: | VII |
| Issue: | 8 |
| Date of Publication: | August, 1915 |
| Page: | 10 |
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