f g tryon

F. G. Tryon · Yayınevi bilinmiyor

63 sayfa · 1937

Mineral industries / Mining engineering

Nourse, Edwin Griswold Tryon, F. G. ; Drury, Horace B. ; Leven, Maurice, ; Moulton, Harold Glenn, ; Lewis, Cleona, · The Brookings Institution

Sayfa sayısı yok · 1934

Kategori yok

Willard E. Hotchkiss, F. G. Tryon, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), United States. Bureau of Mines · Work Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines

436 sayfa · 1939

Coal mines and mining / Coal miners / Bituminous coal / Coal-mining machinery

F. G. Tryon, William Harvey Young, Malcolm Earl Wilson, F. E. Berquist, Maxine M. Otero, Dever C. Ashmead, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), United States. Bureau of Mines, · Dept. of Commerce, Bureau of the Census