@book{52593,
	author = {Walker, Sears Cook,},
	title = {An ephemeris of the planet Neptune ... [1846]-1852.},
	publisher = {Gideon and Co., printers},
	year = {[1849-53]},
	series = {Smithsonian contributions to knowledge: vol. II, app. I-III; vol. III, app. I},
	address = {Washington, D.C.,}
}