Schapp, W. Archivmaterialien zu Wilhelm Schapp, 1884-1969.
Tohutoru Kātū Chicago (17th ed.)Schapp, Wilhelm. Archivmaterialien Zu Wilhelm Schapp, 1884-1969.
Tohutoro MLA (9th ed.)Schapp, Wilhelm. Archivmaterialien Zu Wilhelm Schapp, 1884-1969.
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