TY  - RPRT
TI  - Hydrologic Unit Map – 1988, states of Massachusetts, Rhode Island and Connecticut
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1988
DO  - 10.3133/hu21
UR  - https://pubs.usgs.gov/publication/hu21
ID  - hu21
ER  -