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.
Style de citation Chicago (17e éd.)Bond, 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.
Style de citation MLA (8e éd.)Bond, 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.