Mitchell, R. L. (1948). The spectrographic analysis of soils, plants and related materials. Commonwealth Bureau of Soil Science.
Citazione stile Chigago Style (17a edizione)Mitchell, R. L. The Spectrographic Analysis of Soils, Plants and Related Materials. Harpenden, England: Commonwealth Bureau of Soil Science, 1948.
Citatione MLA (8a ed.)Mitchell, R. L. The Spectrographic Analysis of Soils, Plants and Related Materials. Commonwealth Bureau of Soil Science, 1948.
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