TY  - RPRT
TI  - Hydrogeologic framework of the Michigan Basin regional aquifer system
AU  - David B. Westjohn
AU  - T. L. Weaver
PY  - 1998
DO  - 10.3133/pp1418
UR  - https://pubs.usgs.gov/publication/pp1418
ID  - pp1418
ER  -