61
“...Bălgarska akademija na naukite...”
63
Published: 1972
Superior document: Sto godini Bălgarska Akademija na Naukite 1869 - 1969 3
64
Published: 1980
65
Published: 2012
66
Published: 1965
67
Published: 2018
68
Published: 1975
69
Published: 1963
70
Published: 1988
Links: Inhaltsverzeichnis
71
“...Bălgarska akademija na naukite Naučen archiv...”
72
Published: 1989
73
Published: 1959-1973
74
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Published: 2005
Superior document: Fizikata v Bălgarija 1889-1960 ; nauka, obrazovanie, prosveta ; bibliografija 1
76
Published: 1974
77
Published: 1959
78
Published: 1889-
79
Published: 1965-
80
Published: 1995