Sheehan, William, 1954- Worlds in the sky : planetary discovery from earliest times through Voyager and Magellan / William Sheehan. - Tucson : University of Arizona Press, c1992. - xv, 243 p. : ill. ; 24 cm. Includes bibliographical references (p. [223]-230) and index. ISBN: 0816513082 (paperback) 0816512906 (cloth) LCCN: 91039398 Subjects--Topical Terms: Planets.Astronomy--History.Planets--Exploration. LC Class. No.: QB601 / .S543 1992 Dewey Class. No.: 523.2