21
Published: 1985
Superior document: Pliska - Preslav 4
22
Published: 1979
Superior document: Pliska - Preslav 1
23
Published: 1980
Superior document: Carevgrad Tărnov 3
24
Published: 1995
Superior document: Pliska - Preslav 7
25
Published: 1992
Superior document: Pliska - Preslav 5
26
Published: 1979
Superior document: Izvestija na Archeologičeskija Institut / Bălgarska Akademija na Naukite 35
27
Published: 1974
28
Published: 1981
Superior document: Pliska - Preslav 3
29
Published: [2022]
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