A study of the equilibration method of determining moisture in coal for classification by rank,
by O.W. Rees, F.H. Reed, and G.W. Land ...
- Urbana, Ill., Printed by authority of the state of Illinois, 1939.
- 34 p. incl. illus., tables, diagrs. 25 cm.
- Illinois State Geological Survey. Report of investigations. no. 58 .
At head of title: State of Illinois ... Department of Registration and Education ... Division of the State Geological Survey ... Urbana.