@book{13598,
	author = {Hargest, George E.},
	title = {History of letter post communication between the United States and Europe},
	publisher = {Smithsonian Instiution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]},
	year = {1971.},
	series = {Smithsonian studies in history and technology, no. 6},
	address = {Washington}
}