The Leading Edge; 2005; v. 24; no. Supplement;
p. S18-S25; DOI: 10.1190/1.2112387
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Figure 1. The first exploration seismograph party to operate on a geologic structure in the United States: Oklahoma, August, 1921. The seismograph party consisted of Reginald G. "Rex" Ryan, William P. Haseman, and John C. Karcher. This photo was published on p. 942 of the October 1952 GEOPHYSICS.
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