1
2
published 1994
Book
3
published 1989
Book
4
published 1989
Inhaltsverzeichnis
Book
5
published 1987
Inhaltsverzeichnis
Book
6
7
by Breabăn, Maria L., Nedelcov, C.
published 1973
Book
8
9
published 1953
Journal
10
16
published 2019
Kostenfrei, Verlag
Electronic Journal