TY - RPRT TI - Spring types and contributing aquifers from water-chemistry and multivariate statistical analyses for seeps and springs in Theodore Roosevelt National Park, North Dakota, 2018 AU - Colton J. Medler AU - William G. Eldridge PY - 2021 DO - 10.3133/sir20205121 UR - https://pubs.usgs.gov/publication/sir20205121 ID - sir20205121 ER -