TY  - BOOK
AU  - Condra,GeoE.
TI  - The stratigraphy of the Pennsylvanian system in Nebraska,
T2  - Nebraska.  Geological survey.  Bulletin I, 2d ser
AV  - QE135 .A4 no. 1
PY  - 1927///
CY  - [Lincoln]
PB  - Printed by authority of the state of Nebraska [The University of Nebraska press]
KW  - Geology, Stratigraphic
KW  - Pennsylvanian
KW  - Geology
KW  - Nebraska
N1  - Bibliographical footnotes
ER  -