TY  - RPRT
TI  - A digital-computer model of the Big Sioux aquifer in Minnehaha County, South Dakota
AU  - N.C. Koch
PY  - 1982
DO  - 10.3133/wri824064
UR  - https://pubs.usgs.gov/publication/wri824064
ID  - wri824064
ER  -