1. Water use in Oklahoma 1950-2005 Author/Creator: Tortorelli, Robert L. Publication/Creation: Reston, Va. : U.S. Geological Survey, 2009 Resource Type: Book Access & Availability: Loading
2. Hydrologic drought of water year 2006 compared with four major drought periods of the 20th century in Oklahoma Author/Creator: Tortorelli, Robert L. Publication/Creation: Reston, Va. : U.S. Geological Survey, 2008 Resource Type: Book Access & Availability: Loading
3. Nutrient concentrations, loads, and yields in the Eucha-Spavinaw basin, Arkansas and Oklahoma, 2002-2006 Author/Creator: Tortorelli, Robert L. Publication/Creation: Reston, Va. : U.S. Geological Survey, 2008 Resource Type: Book Access & Availability: Loading
4. Phosphorus concentrations, loads, and yields in the Illinois River basin, Arkansas and Oklahoma, 2000-2004 Author/Creator: Tortorelli, Robert L. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Resource Type: Book Access & Availability: Loading
5. Trends in annual peak flows and mean annual flows of selected streams within and near Oklahoma Author/Creator: Tortorelli, Robert L. Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005 Resource Type: Book Access & Availability: Loading
6. Statistical summaries of streamflow in Oklahoma through 1999 Author/Creator: Tortorelli, Robert L. Publication/Creation: Oklahoma City, Okla. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
7. Flood frequency estimates and documented and potential extreme peak discharges in Oklahoma Author/Creator: Tortorelli, Robert L. Publication/Creation: Oklahoma City, OK : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading