| Source: The Pet Milk Magazine (1952-1967) and Profile (1966-1967) Location: St.L. / 05 / P44 | |
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| Last Name: | Zipfel |
| First Name: | Ralph |
| Portrait: | Yes |
| Volume: | 4 |
| Issue: | 8 |
| Date of Publication: | October 1955 |
| Page: | 21 |
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