And here's a video presentation by the author: https://youtu.be/GcCqDp7uvC8?si=L7lEw8ZtXAgDuQMM

There's actually a nice lecture from Reber himself in 1975, although the video quality is poor. Still worth a watch if you're curious about the history. https://youtu.be/xjG-97DgbO0?si=n0MTyI6eUrGZOUC6

Grote Reber, for nearly a decade before and during the war, was the only radio astronomer in the world. Not bad for an amateur!