The Pennsylvanian formations of southeastern Nebraska Condra, Geo. E. (George Evert) 1869-1958 creator Bengtson, N. A. (Nels August) 1879- joint author. text nbu Lincoln?] 1915 monographic eng
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60 p. incl. illus. 2 fold. profiles. 22 cm. by Geo. E. Condra and N.A. Bengtson ... a summary report of papers given before the Nebraska academy of sciences ... At head of title: Nebraska physical and social science series. Forms Bulletin no. [2] of the Nebraska conservation and soil survey of the University of Nebraska. n-us-nb Geology Nebraska Q11 .N3 vol. 9, no. 2 557.82 506.2782 Publications (Nebraska Academy of Sciences) ; v. 9, no. 2 Nebraska physical and social science series Bulletin (Nebraska. Conservation and Soil Survey) ; no. 2 gs 15000744 U.S. Geol. Survey Libr./ICU 880226 20260227111318.0 gs 15000744