Otis, Arthur Sinton Light velocity and relativity. - 3d ed. - New York C.E. Burckel 1963. - 130 p. illus. 22 cm. LCCN: 63015608 /L/r85 Subjects--Topical Terms: Relativity PhysicsLight--Speed. LC Class. No.: QC6 / .O8 1963 Dewey Class. No.: 530.11