TY  - RPRT
TI  - Resources for teachers and students at the Upper Midwest Environmental Sciences Center
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 2004
DO  - 10.3133/fs20043058
UR  - https://pubs.usgs.gov/publication/fs20043058
ID  - fs20043058
ER  -