@book{21709,
	author = {Snyder, John Parr and Voxland, Philip M.},
	title = {An album of map projections},
	publisher = {U.S. G.P.O.},
	year = {1989.},
	series = {U.S. Geological Survey professional paper},
	address = {[Washington, D.C.]},
	note = {Includes index.}
}