Current developments in coal.

Bibliographic Details
Corporate Author:	Mineral Industries Conference of Illinois Urbana
Format:	Conference Proceeding Book
Language:	English
Published:	Urbana, [publisher not identified] ; 1938.
Series:	Circular (Illinois State Geological Survey) ; 23-A.
Subjects:	Coal > Congresses. Coal > Illinois > Congresses.

Description
Item Description:	"Extract of the Contributions of the fifth annual Illinois Mineral Industries Conference."
Physical Description:	59 pages