Argyle, R. W.  <br/><br/>
Observing and Measuring Visual Double Stars  [eBook] 

 - 2nd ed. 
 - New York  Springer New York  2012 
 - Online resource 
 - The Patrick Moore Practical Astronomy Series .
<br/><br/><label>ISBN: </label>978-1-4614-3944-8 (Print) 978-1-4614-3945-5 (Online) 
<br/><br/><label>ISSN: </label>1431-9756 (Print) 2197-6562 (Online) 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Astronomy, Observations and Techniques<br/>Physics