Acker, Agnes <br/><br/>
Strasbourg-ESO catalogue of galactic planetary nebulae  pt. II 
Agnes Acker…[et al.]                                                  
 - Germany  European Southern Observatory  1992 
 - 747p 
<br/><br/><label>ISBN: </label>3-923524-41-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus