The book has no illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from the publisher's website (GeneralBooksClub.com). You can also preview excerpts of the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Original Publisher: Washington, D.C.: Scientific and Technical Information Branch National Aeronautics and Space Administration: For sale by the Supt. of Docs., U.S. G.P.O.; Publication date: 1980; Subjects: Jupiter probes; Jupiter (Planet); Voyager Project; Project Voyager; Science / Astronomy; Science / Astrophysics