- This information describes, in an organized and practical manner, the state of the art of RADAR at the end of the second world war.
- The technology is of educational and hobby interest and all copyrights have expired.
- Each "index" file (left pane) contains only the front matter, foreword, preface and table of contents for its volume (but not the actual index).
- Each volume (right pane) includes its own front matter, foreword, preface, table of contents, and index.
- The paper copies of these volumes have far better photograph reproductions. Finding them for sale online is recommended for devotees.