TY  - RPRT
TI  - Digital map of predevelopment water levels for the High Plains Aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
AU  - Joel R. Cederstrand
AU  - Mark F. Becker
PY  - 1999
DO  - 10.3133/ofr99264
UR  - https://pubs.usgs.gov/publication/ofr99264
ID  - ofr99264
ER  -