Permo-Pennsylvanian section of the Hartville area of Wyoming,
Condra, Geo. E. 1869-1958.
Permo-Pennsylvanian section of the Hartville area of Wyoming, by G. E. Condra and E. C. Reed. - [Lincoln] Published by authority of the state of Nebraska, 1935. - 46 p. illus.
Cover title
Bibliographical foot-notes.
gs 36000025
Geology, Stratigraphic--Permian.
Geology, Stratigraphic--Pennsylvanian.
Geology--Wyoming.
QE135 / .A43 no. 9
Permo-Pennsylvanian section of the Hartville area of Wyoming, by G. E. Condra and E. C. Reed. - [Lincoln] Published by authority of the state of Nebraska, 1935. - 46 p. illus.
Cover title
Bibliographical foot-notes.
gs 36000025
Geology, Stratigraphic--Permian.
Geology, Stratigraphic--Pennsylvanian.
Geology--Wyoming.
QE135 / .A43 no. 9