1928
The first edition, 1913, was published by the Ministry of commerce, industry and labor. All the materials in this volume belong to the collection of the National ethnographic museum at Sofia. [Part] 1. Zapadna i severozapadna Bŭlgaria = Bulgarie de l'ouest et de nord-ouest. 2. izd. = 2. edition, 1929 / naredili = publiée par St. L. Kostow. - [Part]. 2. IUgozapadna Bŭlgaria i Makedonia = Bulgarie du sud-ouest et Macedoine / naredili = publiée par St. L. Kostow, E. Peteva. 1. izd. = 1. ed., 1928; Additional electronic version available through Internet Archive: https://archive.org/details/bulgarskinarodni00naro
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