| Source: St. Louis in World War II Casualties, October 1941-March 1943, scrapbook Location: St.L. / 9.95 / Scr1c | |
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| Last Name: | Koen |
| First Name: | William |
| Middle Name: | R. |
| Title: | Jr. |
| Age: | 19 |
| Death Date: | 1942 Dec 22 |
| African American: | No |
| Page: | 100 |
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