| Source: Mercantile and Manufacturing Scrapbooks, circa 1948-1977 Location: Reading Room / St.L. / 658 / M533 | |
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| Corporate Name: | Ralston Purina Co. |
| Second Corporate Name: | Checkerboard Square |
| Volume: | 5 |
| Page: | 12 |
| Remarks: | "Ralston Remodeling Building Here," 1973 |
