Materiali po istoriia na profsuiuznoto dvizhenie v Bulgariia
By: [avt. kol. Dimitur Mladenov ... et al. ; sust. i nauch. red. Berta Kalaora]
Series: V pomosht na uchastnitsite v profsuiuznata uchebna godina
Publisher: Profizdat
Published: 1973
Place of publication: Sofiia
Language: bul
Number of pages: 174