| Source: Mercantile, Industrial and Professional Saint Louis / by E.D. Kargau (1902) Location: Reading Room / St.L. / 9.17 / K14 | |
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| Corporate Name: | Erker Bros. Optical Co. |
| Address: | Olive between 4th and 5th Sts.; 204 North Broadway, 617 Olive St.; 608 Olive |
| Page: | 417-418 |
