American Journeys - "Eyewitness Accounts of Early American Exploration and Settlement: A Digital Library and Learning Center" - Wisconsin Historical Society
Definitions of Document/Source Types
Atlas - "A book or bound collection of maps, sometimes with supplementary illustrations and graphic analyses." Answers.com. <http://www.answers.com/topic/atlas-topology>
Gazetteer - "Dictionary or encyclopedia listing alphabetically the names of places, political divisions, and physical features of the earth and giving some information about each." Columbia Encyclopedia, 2003. <http://www.answers.com/topic/gazetteer>