Schroeder, A., & Küppers, L. (1965). Katharina: Text zu Geschichte u. Legende v. Leonhard Küppers. Bongers.
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Tohutoru Kātū Chicago (17th ed.)
Schroeder, Anneliese, me Leonhard Küppers. Katharina: Text Zu Geschichte U. Legende V. Leonhard Küppers. Recklinghausen: Bongers, 1965.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
Tohutoro MLA (9th ed.)
Schroeder, Anneliese, me Leonhard Küppers. Katharina: Text Zu Geschichte U. Legende V. Leonhard Küppers. Bongers, 1965.
I tāruatia paitia ki te papatopenga
Kua rahua te tārua ki te papatopenga
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