• publisher: Urbana, Ill. : The University
  • creator: Breckenridge, L. P. (Lester Paige), 1858-1940 Geological Survey (U.S.). Technologic Branch Diserens, Paul
  • contributor: Diserens, Paul. Geological Survey (U.S.). Technologic Branch.
  • Keyword: Coal Illinois. Coal Testing.
  • years: 1908.
  • pages: 54 p. :
  • class: TP326.U6
  • download: pdf file