Roemer, T. (1927). Handbuch des Zuckerrübenbaues.
Tohutoru Kātū Chicago (17th ed.)Roemer, Theodor. Handbuch Des Zuckerrübenbaues. 1927.
Tohutoro MLA (9th ed.)Roemer, Theodor. Handbuch Des Zuckerrübenbaues. 1927.
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