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Buchanan, R. 1989. "To Bring Together, Correlate, and Preserve" - A History of the Kansas Geological Survey, 1864-1989.
Bulletin (Kansas Geological Survey)
. 227 (Jan. 1989), 1–96. DOI:
https://doi.org/10.17161/kgsbulletin.no.i227.22275
.