About the Author Shelly Sommer is a librarian and researcher for ESRI and the science library manager at the Institute of Arctic and Alpine Research at the University of Colorado-Boulder. She lives in Boulder, Colorado. Tasha Wade is the coordinator for the ESRI GIS library project, where she oversees the design and development of several Web resources, including the GIS dictionary on the ESRI support center. She lives in Redlands, California. Read more
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