Wiessmann, H. (1926). Agrikulturchemisches Praktikum. Quantitative Analyse.
Tohutoru Kātū Chicago (17th ed.)Wiessmann, Hans. Agrikulturchemisches Praktikum. Quantitative Analyse. 1926.
Tohutoro MLA (9th ed.)Wiessmann, Hans. Agrikulturchemisches Praktikum. Quantitative Analyse. 1926.
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