Observing and Measuring Visual Double Stars
Robert W. Argyle · Springer · 2004
Wikipedia
{{cite book |last=Argyle |first=Robert W. |title=Observing and Measuring Visual Double Stars |publisher=Springer |year=2004 |isbn=9781852335588}}
Robert W. Argyle · Springer · 2004
{{cite book |last=Argyle |first=Robert W. |title=Observing and Measuring Visual Double Stars |publisher=Springer |year=2004 |isbn=9781852335588}}