Pennsylvanian rocks of the eastern Kentucky coal field
1994 ◽
Vol 106
(1-4)
◽
pp. 287-305
◽
Keyword(s):
1990 ◽
Vol 64
(3)
◽
pp. 475-477
◽
1992 ◽
Vol 75
(3-4)
◽
pp. 209-221
◽
1997 ◽
Vol 33
(3)
◽
pp. 183-207
◽
1997 ◽
Vol 12
(3)
◽
pp. 281-289
◽