Schwartz, Jacob T. Relativity in illustrations / Jacob T. Schwartz ; designed and il. by Felix Cooper. - 1a ed. - New York : Dover Publications, 1989 - 117 p. : ěl. ; 23 cm. ISBN: 048625965X Subjects--Topical Terms: Relatividad--Trabajos populares LC Class. No.: QC173.57 / S35 1989