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 Does anyone know of a map showing how many people live at sea level and then va
 rious increments of elevations above sea level? The patron wants this for the U
 S.  I sort of picture this as a contour map for the whole country with some sor
 t of symbol for showing the population.
 
 Arlyn Sherwood
 Map Librarian
 Illinois State Library
 217/782-5823 phone  217/782-4446 fax