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A Cooperative Investigation of Precision and Accuracy in Chemical, Spectrochemical and Modal Analysis of Silicate Rocks
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From foreword: This bulletin is the second of the series "Contributions to Geochemistry" which was begun in 1946 with Bulletin 950, "Contributions to Geochemistry, 1942-45". This series is the successor to earlier ones, also published as U. S. Geological Survey Bulletins, "Report of work done in the Division of Chemistry and Physics" (1879-1893), "Contributions to chemistry and mineralogy from the laboratory of the United States Geological Survey" (1900), "Contributions to mineralogy from the United States Geological Survey" (1905), and "Mineralogical Notes" (1911-16).