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john b janus
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Analyses of tipple and delivered samples of coal collected during fiscal year 1974
John B. Janus · U.S. Dept. of the Interior, Bureau of Mines : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
13 sayfa · 1975
Coal / Analysis
Analyses of tipple and delivered samples of coal collected during fiscal year 1975
John B. Janus · U.S. Dept. of the Interior, Bureau of Mines : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
10 sayfa · 1976
Coal / Analysis