TY - RPRT TI - Methods to Identify Changes in Background Water-Quality Conditions Using Dissolved-Solids Concentrations and Loads as Indicators, Arkansas River and Fountain Creek, in the Vicinity of Pueblo, Colorado AU - Roderick F. Ortiz PY - 2004 DO - 10.3133/sir20045024 UR - https://pubs.usgs.gov/publication/sir20045024 ID - sir20045024 ER -