00888cam a22002891 4500 gs 57000218 DLC 20260227111405.0 780328s1957 arua s000 0 eng gs 57000218 (OCoLC)3757437 DLC ArCCA DLC premarc n-us-ar QE87 .A3 no. 19 557.67 Caplan, W. M. (William Milton) Subsurface geology of northwestern Arkansas. Little Rock, 1957. iv, 14 p. maps (part fold.) tables. 28 cm. Arkansas. Geological and Conservation Commission. Information circular 19 Bibliography: p. 9. Geology Arkansas. Geology Arkansas Maps. Geology, Stratigraphic. Arkansas Geological and Conservation Commission 29170 29170