No statement of edition on the copyright page, but there is a complete number line: "10 9 8 7 6 5 4 3 2 1".
The copyright page contains the complete Library of Congress Cataloging in Publication Data including the year of publication (1980), the ISBN (0-02-521070-X), and the LCCN (80-13179).
"Designed by Jack Meserole" stated on the copyright page.
"Jacket design by Bob Silverman" (over) "Illustration by Hector Garrido" printed on the back flap of the dustjacket.
Month of publication from Locus #238 (October 1980).