1
Date 1959-
... Bulgarije ...
periodiek
2
Periodiciteit: driemaandelijks Date 1975-
... Bulgarije ...
periodiek
3
6
By Thonet, Joseph
Date s.a.
... Bulgarije ...
brochure
7
8
9
12
By Gavazov, Miltcho
Date 1985
... Bulgarije ...
brochure
13
14
15
By Elazar, David
Date 1972
... Bulgarije ...
monografie
16
19
By Panaiotov, Philippe
Date 1963
... Bulgarije ...
monografie
20
By Parmelin, Hélène
Date 1951
... Bulgarije ...
monografie