1. Variability of pesticide detections and concentrations in field replicate water samples collected for the National Water-Quality Assessment Program, 1992-97 Author/Creator: Martin, Jeffrey D. Publication/Creation: Indianapolis, Ind. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Format: Book Access & Availability: Loading
2. Variations in sand storage measured at monumented cross sections in the Colorado River between Glen Canyon Dam and Lava Falls Rapid, northern Arizona, 1992-99 Author/Creator: Flynn, Marilyn E. Publication/Creation: Denver, CO : U.S. Geological Survey, Information Services [distributor]. Format: Book Access & Availability: Loading