TY  - RPRT
TI  - Groundwater flow and velocity in a 500 ka pre-Illinoian till, eastern Iowa
AU  - K. E. Schilling
AU  - S. Tassier-Surine
PY  - 2006
DO  - 10.1007/s00254-006-0299-9
UR  - https://pubs.usgs.gov/publication/70028268
ID  - 70028268
ER  -