Hefele, K. J. Archivmaterialien zu Karl Joseph Hefele, 1809-1893.
Tohutoru Kātū Chicago (17th ed.)Hefele, Karl Joseph. Archivmaterialien Zu Karl Joseph Hefele, 1809-1893.
Tohutoro MLA (9th ed.)Hefele, Karl Joseph. Archivmaterialien Zu Karl Joseph Hefele, 1809-1893.
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