@book{26505,
	author = {Cooper, Grace Rogers.},
	title = {Thirteen-star flags: keys to identification.},
	publisher = {Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]},
	year = {1973.},
	series = {Smithsonian studies in history and technology, no. 21},
	address = {Washington}
}