Roy, A. E. 1924-2012. Astronomy : principles and practice / A.E. Roy, D. Clarke. - 4th - Bristol ; Philadelphia : Institute of Physics Pub., c2003. - xxiii, 475 p. : ill. ; 23 cm. TBH/SINV00482/117GBP 44.99 Includes bibliographical references (p. 458-459) and index. ISBN: 0750309172 9780750309172 Subjects--Topical Terms: Astronomy. Dewey Class. No.: 520 ROY