Correlation of the Big Blue series in Nebraska,
Condra, Geo. E. 1869-1958.
Correlation of the Big Blue series in Nebraska, by G. E. Condra and J. E. Upp. - [Lincoln] Printed by authority of the state of Nebraska, 1931. - 74, [2] p. incl. illus., map, tables. 25 cm. - Nebraska. Geological survey. Bulletin 6, second ser. .
At head of title: University of Nebraska.
"Annotated bibliography of the Big Blue series": p. 68-74.
gs 32000041
Geology--Nebraska.
Geology, Stratigraphic--Permian.
QE135 / .A4 no. 6
Correlation of the Big Blue series in Nebraska, by G. E. Condra and J. E. Upp. - [Lincoln] Printed by authority of the state of Nebraska, 1931. - 74, [2] p. incl. illus., map, tables. 25 cm. - Nebraska. Geological survey. Bulletin 6, second ser. .
At head of title: University of Nebraska.
"Annotated bibliography of the Big Blue series": p. 68-74.
gs 32000041
Geology--Nebraska.
Geology, Stratigraphic--Permian.
QE135 / .A4 no. 6