Sievers, L. Archivmaterialien zu Leo Sievers, 1917-2009.
Tohutoru Kātū Chicago (17th ed.)Sievers, Leo. Archivmaterialien Zu Leo Sievers, 1917-2009.
Tohutoro MLA (9th ed.)Sievers, Leo. Archivmaterialien Zu Leo Sievers, 1917-2009.
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