TY  - RPRT
TI  - Ground-water levels in the United States, 1962-66, north-central states
AU  - C. L. McGuinness
PY  - 1969
DO  - 10.3133/wsp1976
UR  - https://pubs.usgs.gov/publication/wsp1976
ID  - wsp1976
ER  -