Illinois fluorspar
By: G. C. Finger, H. E. Risser [and] J. C. Bradbury.
Series: Illinois. State Geological Survey ; Circular 296
Publisher: Division of the Illinois State Geological Survey
Published: 1960
Place of publication: Urbana
Language: eng
Number of pages: 36
Subjects: Fluorspar.
Notes: Bibliography: p. 34-36.