E/MJ : engineering and mining journal . -Horace V. Winchell, President, 1919-20. -Sidney J. Jennings, Past President, 1919-21. -Philip N. Moore, Past President, 1919-20. R. Ledoux, St Vice-Prcs 5—George D. Barron, Treasurer. 1919-20. 6—Charles W. Goodale, Vice-Pros., 19!9-20. 7—Mark L. Requa,Vice-Pres., 19I9-20. 8—Henry S. Drinker, Vice-Pres., 1919--21.

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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries