• publisher: Washington, The Bureau; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
  • creator: United States. Bureau of Mines
  • Keyword: Mining industries United States. Mines and mineral resources United States.
  • years: 1911-1949.
  • pages: 727 no.
  • language: eng
  • lccn: d
  • class: TN1
  • isbn: 0886-0904
  • notes: Part of the illustrative matter is folded.
  • download: pdf file