TY  - BOOK
AU  - Condra,GeoE.
AU  - Upp,Jerry Eli
TI  - Correlation of the Big Blue series in Nebraska,
T2  - Nebraska.  Geological survey.  Bulletin 6, second ser
AV  - QE135 .A4 no. 6
PY  - 1931///
CY  - [Lincoln]
PB  - Printed by authority of the state of Nebraska
KW  - Geology
KW  - Nebraska
KW  - Geology, Stratigraphic
KW  - Permian
N1  - At head of title: University of Nebraska; "Annotated bibliography of the Big Blue series": p. 68-74
ER  -