G. E. and Reed E. C. Condra books & textbook

Permo-Pennsylvanian section of the Hartville area of Wyoming,

G.E. & Reed E.C. Condra

Nebraska Geol Survey /1935T Paperback

DEEP WELLS AT LINCOLN, NEBRASKA

G. E. and Reed E. C. Condra

Nebraska Geological Survey /1939T Paperback