1. On the watch for geomagnetic storms Author/Creator: Green, Arthur W. Publication/Creation: [Reston, Va.] : [U.S. Dept. of the Interior, U.S. Geological Survey], [1997] Resource Type: Book Access & Availability: Loading
2. Overview of drought and hydrologic conditions in the United States and southern Canada : water years 1986-90 Author/Creator: Holmes, Sandra, 1945- Publication/Creation: [Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 1992 Resource Type: Book Access & Availability: Loading