Frings, T. Archivmaterialien zu Theodor Frings, 1886-1968.
Tohutoru Kātū Chicago (17th ed.)Frings, Theodor. Archivmaterialien Zu Theodor Frings, 1886-1968.
Tohutoro MLA (9th ed.)Frings, Theodor. Archivmaterialien Zu Theodor Frings, 1886-1968.
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