1
2
3
4
5
Published: Sofija : Litavra, 1998
Serial
6
Serial
7
Published: Sofija : Klub '90, 1995
Serial
8
Published: Sofija : Klub '90, 1994
Serial
9
10
11
Book
12
Published in: Statističeski godišnik na bălgarskite dăržavni želěznici i pristanišča
1939(1941)
Book
13
Book
14
15
16
17
Published: Berlin : AK Museumspädagogik beim Rat für Museumswesen, 1983
Book
18
Published: München : Verlag Moos & Partner, 1990
Book
19
Published: München : Wilhelm Goldmann Taschenbuchverlag, 1964
Book
20