Lawden, Derek F. Elements of relativity theory/ D. F. Lawden. - Chichester New York: Wiley, c1985. - x, 108 p.: ill.; 20 cm. Includes index. ISBN: 0471908525 (pbk.) : $8.13 (U.S.) LCCN: 85012291 Nat. Bib. No.: GB85-28851 Subjects--Topical Terms: Relativity (Physics) Dewey Class. No.: 530.11 / L416e Universal Decimal Class. No.: 530.12:531.18