Herschel 400 Observing Guide by Steve O'Meara (English) Paperback Book

Observing and Measuring Visual Double Stars (The Patrick Moore Practical - GOOD

The Patrick Moore Practical Astronomy Ser.: Observing and Measuring Visual...

Observing and Measuring Visual Double Stars (Paperback or Softback)

Observing and Measuring Visual Double Stars (The Pat...

Observing and Measuring Visual Double Stars, Paperback by Argyle, R. W. (EDT)...

Observing and Measuring Visual Double Stars

Observing Visual Double Stars by Paul Couteau MIT Astronomy Book 1981