Entsiklopediya B"lgariya
By: gl. red. Vladimir Georgiev. T.5 P-R.
Contributors: Georgiev, Vladimir.; B"lgarska akadaemiya na naukite.
Publisher: Izdatel'stvo na B"lgarskata akademiya na naukite
Published: 1986
Place of publication: Sofiya
Language: bul
Number of pages: 876