. . . "1980". . "Hardcover"@en. . . . "1980". . "Paperback"@en. . . . . . . "National Book Award for Science Fiction"@en. "1980". . "1980". "Source: Freebase - The World's database". . _:yEjgKsKX1303. . . . . _:yEjgKsKX1303 . _:yEjgKsKX1303 "national_book_award_for_science_fiction".