Spectral classification and multicolour photometry:   Symposium no. 50 held in Villa Carlos Paz, Argentina, October 18-24, 1971 

 -  Dordrecht,  D. Reidel Publishing Company,  
 - xiv, 314p.  
 - (International Astronomical Union) .
<br/><br/><label>ISBN: </label>9789027702807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical
<br/><br/><label>Subjects--Index Terms: </label>photometry 
<br/><br/><label>Universal Decimal Class. No.: </label>520.849(082.2)  / L3