EUROPEAN MEETING ON SOLAR PHYSICS(1990 <br/><br/>
"The dynamic sun. Proceedings of the 6th European meeting on solar physics, Debrecen, Hungary, May 21-24, 1990: The dynamic Sun" 

 - Debrecen  Debrecen Observatory  1990 
 - 312 p. 
 - Publications of the Debrecen Heliophys Observatory. Vol-7 .