共 50 条
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- [26] The German Potash Industry and Potash Law - An economic Study, vol 8 ARCHIV FUR SOZIALWISSENSCHAFT UND SOZIALPOLITIK, 1912, 34 (01): : 268 - 272
- [30] The American potash industry and its problems JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY-US, 1921, 13 : 249 - 252