| Source: The Printing Trades Magazine, 1909-1915 (incomplete run) Location: St.L. / 05 / P936 | |
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| Corporate Name: | Klein & Engel |
| Address: | 411 Olive |
| Advertisement: | yes |
| Volume: | VI |
| Issue: | 4 |
| Date of Publication: | April 1914 |
| Page: | 6 |
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