New York: Bowker, (1995.). Hardcover first edition - A comprehensive and important work on science fiction: covers the emergence of sf (to 1920), between the wars (1918-1938), the early modern period (1938-1963), the modern period (1964-1986) by Brian Stapleford, children's and young adult sf, an extensive checklist on science fiction in languages other than English (numerous entries for German, French, Russian, Japanese, Italian, Danish, Swedish, Norwegian, Dutch, Belgian, Romanian, and Yugoslav science fiction and foreign-language secondary material and a survey of Hebrew science fiction) as well as a core collection checklist, author, subject and title indexes, and much more. Introduction by James Gunn. xxiv, 912 pp. ISBN: 0-8352-32883.

New York: Bowker, 1987. dj. Hardcover first edition - A comprehensive and important work on science fiction: covers the emergence of sf (to 1920), between the wars (1918-1938), the early modern period (1938-1963), the modern period (1964-1986) by Brian Stapleford, children's and young adult sf, an extensive checklist on science fiction in languages other than English (numerous entries for German, French, Russian, Japanese, Italian, Danish, Swedish, Norwegian, Dutch, Belgian, Romanian, and Yugoslav science fiction and foreign-language secondary material and a survey of Hebrew science fiction) as well as a core collection checklist, author, subject and title indexes, and much more. Introduction by Brian Aldiss. 874 pp. ISBN: 0-835-223124.