First edition thus (not stated). The "Nelson Doubleday" imprint implies an original publication by Doubleday book clubs.
"Book Club Edition" printed at the bottom of the front flap of the dustjacket indicates a printing by Doubleday for its various book clubs.
Selection of the Science Fiction Book Club for February 1981.
No printed price or stated date of publication. Both given here are taken from the SFBC announcement flyer.
"5574" printed at the bottom on the back flap of the dustjacket.
Gutter code "L03" [Primary Verification 2] on page 659 indicates a printing in January 1981. Later printings have the gutter code "L15" (April 1981) [PV1], "L26" (June 1981), "M04" (January 1982), and "N13" (March 1983).
"Jacket Painting by Tony Fiyalko" printed on the back flap of the dustjacket.
"Published by arrangement with Del Rey/Ballantine Books" stated on the copyright page.