00486nam a2200157Ia 4500003000900000008004100009040001600050080001700066100001400083245010700097260004900204300001300253650004100266650000800307650001300315IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a523.982bZWA  aZwaan, C. 0aSunspot models: a study of sunspot spectracC. Zwaan                                                    aD'Utrecht,bL' Observatoire D' Utrechtc1965  av, 182p.  aAstronomy and Astrophysics Thesaurus  aSun  aSunspots