@book{50811,
	author = {Veblen, Oswald, and Whitehead, John Henry Constantine,},
	title = {The foundations of differential geometry /},
	publisher = {Cambridge University Press,},
	year = {c1932, [Reprinted 1953, 1960]},
	series = {Cambridge tracts in mathematics and mathematical physics ;},
	address = {Cambridge :}
}