Observing and measuring visual double stars 
edited by Bob Argyle                                           
 - London  Springer-Verlag  2004 
 - xii, 326p. 
 - Patrick Moore's practical astronomy series .
<br/><br/><label>ISBN: </label>1-85233-558-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Double stars-observer's manual
<br/><br/><label>Universal Decimal Class. No.: </label>524.38  / OBS