@book{2574,
	author = {Sears, Francis Weston.},
	title = {Optics. /},
	publisher = {Addison-Wesley,},
	year = {c1949.},
	series = {Principles of physics series},
	address = {Cambridge, Mass. :},
	edition = {3d ed.},
	note = {First-third editions published, 1946-1948, as v. 3 of the author’s Principles of physics.}
}