| Source: Mercantile and Manufacturing Scrapbooks, circa 1948-1977 Location: Reading Room / St.L. / 658 / M533 | |
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| Last Name: | Hoff |
| First Name: | Roy |
| Middle Name: | L. |
| Volume: | 3 |
| Page: | 177-178 |
| Remarks: | in article regarding traffic sign manufacturer, 1965 |
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