List of Widco logs run by State Geological Survey, before March 1, 1964,
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 . - Circular (South Dakota Geological Survey) ; no. 32. .
gs 65000231
Borings--South Dakota.
QE163 / .H415
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 . - Circular (South Dakota Geological Survey) ; no. 32. .
gs 65000231
Borings--South Dakota.
QE163 / .H415