Atlas bolgarskikh govorov v SSSR.
Subtitle: Vstupitel'nye stat'i.
Contributors: Bernshteĭn, Samuil Borisovich, 1910-
Publisher: Izd-vo Akademii nauk SSSR
Published: 1958
Place of publication: Moskva
Language: rus
Number of pages: 81
Subjects: Bulgarian language -- Dialects -- Russia -- Maps