Bond, F. (1983). Map of the conterminous United States showing routes of the principal explorers from 1501 to 1844, whose work had an important bearing on the settlement of the country and the fixing of its successive boundaries. U.S. Geological Survey.
Chicago Style (17th ed.) CitationBond, Frank. Map of the Conterminous United States Showing Routes of the Principal Explorers from 1501 to 1844, Whose Work Had an Important Bearing on the Settlement of the Country and the Fixing of Its Successive Boundaries. Reston, Va.: U.S. Geological Survey, 1983.
MLA (8th ed.) CitationBond, Frank. Map of the Conterminous United States Showing Routes of the Principal Explorers from 1501 to 1844, Whose Work Had an Important Bearing on the Settlement of the Country and the Fixing of Its Successive Boundaries. U.S. Geological Survey, 1983.