Contributions to the study of coal
Subtitle: mineral matter of no. 6 bed coal at West Frankfort, Franklin County, Illinois
By: by Clayton G. Ball. Printed by authority of the state of Illinois
Series: Illinois State Geological Survey Report of investigations -- no. 33
Published: 1935
Place of publication: Urbana, Illinois
Language: eng
Number of pages: 106
Subjects: Coal; Coal mines and mining
Notes: At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.