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. : National Aeronautics and Space Administration, NASA History Office : For sale by the U.S. G.P.O., Supt. of Docs.; Publication date: 1996; Subjects: Planetology; Planets; Radar in astronomy; Planetology/ United States; Planets/ Exploration; Radar in astronomy; Science / Astronomy; Science / Astronomy; Science / Astrophysics