| Source: Parks Air News, 1933-1949 Location: IL / 629.13 / P252n (oversize box) | |
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| Last Name: | Zimmerman |
| First Name: | David |
| Middle Name: | P. |
| Volume: | 8 |
| Issue: | 2 |
| Date of Publication: | April 1940 |
| Page: | 3 |
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