Directory of Illinois mineral operators, to accompany mineral industries map, September 1, 1920
By: Comp. by H. P. Christensen
Contributors: Christensen, H. P. (Henrietta Petrea)
Publisher: Printed by authority of the State of Illinois [Schnepp & Barnes, Printers, Springfield]
Published: 1921
Place of publication: Urbana
Language: eng
Number of pages: 76
Subjects: Mineral industries -- Illinois -- Directories.
Notes: At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey. Frank W. De Wolf, chief.