RT Journal Article SR Electronic T1 Underground stratigraphic characteristics of eastern Oklahoma JF American Journal of Science JO Am J Sci FD American Journal of Science SP 140 OP 146 DO 10.2475/ajs.s5-5.26.140 VO s5-5 IS 26 A1 Trager, Earl A. YR 1923 UL http://www.ajsonline.org/content/s5-5/26/140.abstract AB