Structure and development of solar active regions  proceedings of the International Astronomical Union symposium No.35 held in Budapest, Hungary, 4-8 September 1967 
edited by K. O. Kipenheuer                                      
 - Dordrecht  D. Reidel Publishing  1968 
 - xvii, 608p. 
 - IAU symposium; no. 35 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Active sun<br/>Astronomy and Astrophysics Thesaurus<br/>Solar activity
<br/><br/><label>Universal Decimal Class. No.: </label>082.2:52  / IAU-S35