Palynologic and petrographic variation in the Otter Creek coal beds (Stephanian, Upper Carboniferous), western Kentucky
Charles T. Helfrich, James C. HowerVolume:
60
Year:
1989
Language:
english
DOI:
10.1016/0034-6667(89)90076-6
File:
PDF, 2.19 MB
english, 1989