2
Frontdoor-Url
Kostenfrei, Digitalisierung
Electronic Journal
3
4
5
6
7
Published in The astrophysical journal (1995)
Volltext, Kostenfrei, Resolving-System
E-Article
8
Published in The astrophysical journal (1990)
Kostenfrei, Resolving-System
E-Article
10
13
16
19
Kostenfrei, Verlag
E-Article
20