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Analyses of samples of delivered coal : collected from July 1, 1915 to January 1, 1922, with a chapter on the Tidewater pool classifications
- "Analyses of delivered coal"@en
- "Tidewater pool classifications"@en
- "Analyses of samples of delivered coal : collected from July 1, 1915 to January 1, 1922"
- "Analyses of samples of delivered coal collected from July 1, 1915 to January 1, 1922 : with a chapter on the Tidewater pool classifications"
- "Analyses of samples of delivered coal : collected from July 1, 1915 to January 1, 1922, with a chapter on the Tidewater pool classifications"@en