1. Map of mean annual runoff for the northeastern, southeastern, and mid-Atlantic United States, water years 1951-80 Author/Creator: Krug, William R., author Publication/Creation: Denver, Colo. : U.S. Geological Survey, Books and Open-File Reports Section Resource Type: Book Access & Availability: Loading
2. Hydrogeologic and water-quality characteristics of the Cretaceous aquifer, southwestern Minnesota Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Denver, Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey Resource Type: Map Access & Availability: Loading