TY - RPRT TI - Base of principal aquifer for parts of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska AU - Christopher M. Hobza AU - Jared D. Abraham AU - James C. Cannia AU - Michaela R. Johnson AU - Steven S. Sibray PY - 2014 DO - 10.3133/sim3310 UR - https://pubs.usgs.gov/publication/sim3310 ID - sim3310 ER -