1. Debris flows triggered by the El Niño rainstorm of February 2-3, 1998, Walpert Ridge and vicinity, Alameda County, California Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor]. Resource Type: Map Edition: Version 1.0, last modified Feb. 28, 2002. Access & Availability: Loading
2. Distribution of a suite of elements including arsenic and mercury in Alabama coal Author/Creator: Goldhaber, Martin B. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2000 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading