| Source: The Printing Trades Magazine, 1909-1915 (incomplete run) Location: St.L. / 05 / P936 | |
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| Corporate Name: | St. Louis Zoo |
| Volume: | VI |
| Issue: | 4 |
| Date of Publication: | April, 1914 |
| Page: | 9 |
| Remarks: | photo of polar bears in cage |
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