@misc{indiciaec428ddadd023, title = {Water resources data for South Dakota, water year 1974; Part 2, Water quality records}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1975}, doi = {10.3133/wdrsd742}, url = {https://pubs.usgs.gov/publication/wdrSD742}, note = {Source identifier: wdrSD742} }