Kroon, H. (1925). Die Tierzucht in Holland.
Tohutoru Kātū Chicago (17th ed.)Kroon, H.M. Die Tierzucht in Holland. 1925.
Tohutoro MLA (9th ed.)Kroon, H.M. Die Tierzucht in Holland. 1925.
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Tohutoro APA (7th ed.)