2
4
7
9
10
11
published 2019
Kostenfrei, Verlag
OnlineResource Database
12
published 2019
Kostenfrei, Verlag
Electronic Journal
13
16
17
published 2019
Kostenfrei, Verlag
Frontdoor-Url
Electronic Journal
18
19
published 2019
Kostenfrei, Resolving-System
E-Book
20