Regional structure of the Southeast Missouri and Illinois-Kentucky mineral districts /
by A. V. Heyl...[et al.].
-- Washington : United States Government Printing Office, 1965
- 20 p. + map. --
(Geological Survey Bulletin ; 1202-B).
Illinois
Kentucky
Mineralogía
Missouri
549(73)
Illinois
Kentucky
Mineralogía
Missouri
549(73)