TY  - RPRT
TI  - Digital map of the elevation of the base of the High Plains Aquifer in the Republican River Basin upstream of Hardy, Nebraska, in parts of Nebraska, Kansas, and Colorado
AU  - Michaela R. Johnson
AU  - James F. Cornwall
AU  - Matthew K. Landon
PY  - 2002
DO  - 10.3133/ofr0264
UR  - https://pubs.usgs.gov/publication/ofr0264
ID  - ofr0264
ER  -