Stratigraphic policy of the Illinois State Geological Survey
By: [by] H. B. Willman, David H. Swann [and] John C. Frye.
Series: Illinois State Geological Survey. Circular; 249; Circular (Illinois State Geological Survey) ;; 249.
Publisher: Division of the Illinois State Geological Survey
Published: 1958
Place of publication: Urbana
Language: eng
Number of pages: 14
Subjects: Illinois State Geological Survey.; Geology -- Nomenclature.; Rocks -- Classification and nomenclature.; Geology, Stratigraphic.
Notes: Bibliography: p. 14.