TY  - RPRT
TI  - Surficial geologic map of the greater Omaha area, Nebraska and Iowa
AU  - R. R. Shroba
AU  - T. R. Brandt
AU  - J.C. Blossom
PY  - 2001
DO  - 10.3133/mf2391
UR  - https://pubs.usgs.gov/publication/mf2391
ID  - mf2391
ER  -