Nomenclature of the megascopic description of Illinois coals
By: by Gilbert H. Cady
Series: Illinois State Geological Survey -- no. 46; Circular (Illinois State Geological Survey) -- no. 46.
Publisher: Illinois State Geological Survey
Published: 1939
Place of publication: Urbana, Ill
Language: eng
Number of pages: 494
Subjects: Coal
Notes: Reprinted from Economic Geology, vol. 34, no. 5.