00822cam a22002411 4500 gs 65000231 DLC 20260227111416.0 780930s1964 sdub 000 0 eng c gs 65000231 (OCoLC)4259861 US. Geol. Survey Libr. UU OCoLC DLC premarc n-us-sd QE163 .H415 Hedges, Lynn S. List of Widco logs run by State Geological Survey, before March 1, 1964, compiled by Lynn S. Hedges. Vermillion, Science Center, University of South Dakota, 1964. iii, 25 p. map. 28 cm. South Dakota. State Geological Survey. Circular no. 32 Borings South Dakota. Circular (South Dakota Geological Survey) ; no. 32. 30034 30034