TY  - RPRT
TI  - Key water issues now facing our nation
AU  - Robert M. Hirsch
AU  - Timothy L. Miller
AU  - Pixie A. Hamilton
AU  - Robert J. Gilliom
PY  - 2008
UR  - https://pubs.usgs.gov/publication/70192789
ID  - 70192789
ER  -