@book{18529,
	author = {Hubble, Edwin Powell,},
	title = {Our sample of the universe,},
	publisher = {Carnegie institution of Washington,},
	year = {1937.},
	series = {Carnegie institution of Washington. Supplementary publications,},
	address = {Washington, D.C.,},
	note = {"Reprinted from the Scientific monthly, December, 1937, vol. XLV, pages 481-493."}
}