Periodicals
- Libauer Abendzeitung
- Letter from: 13.4.1918, Libau
- Letter from: 13.4.1918, Libau
- Life Magazine <New York>
- Letter from: 16.6.1950, San Francisco (Calif.)
- Letter from: 24.9.1955, Toronto
- Los Angeles Times
- Letter from: 14.7.1950, Ojai (Calif.)