TY - RPRT TI - Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2018 AU - Virginia L. McGuire AU - Ronald C. Seanor AU - William H. Asquith AU - Anna M. Nottmeier AU - David C. Smith AU - Roland W. Tollett AU - Wade H. Kress AU - Kellan R. Strauch PY - 2020 DO - 10.3133/sim3453 UR - https://pubs.usgs.gov/publication/sim3453 ID - sim3453 ER -