-
Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study...
This is a GENERALIZED version of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in... -
Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study...
This is a GENERALIZED version of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in...
E' possibile inoltre accedere al registro usando le API (vedi Documentazione API).