Unpublished reports on open file I
Subtitle: mineral fuels
By: by Margaret B. Brophy
Series: Illinois State Geological Survey. Circular -- no. 201; Circular (Illinois State Geological Survey) -- no. 201.
Publisher: Illinois State Geological Survey
Published: 1955
Place of publication: Urbana
Language: eng
Subjects: Mineral files; Bibliography; Geology
Other titles: Mineral fuels.