Bŭlgarskite profesionalni sŭi︠u︡zi, 1904-1984Dobrin Michev, Berta Kalaora · First published 1984Open the Tome
Georgi Dimitrov, an eminent functionary of the Bulgarian and the international trade union movementBerta Kalaora · First published 1982Open the Tome
Georgi Dimitrov, profsŭi︠u︡zite i nashata sŭvremennostBerta Kalaora · First published 1982Open the Tome
Roli︠a︡ta i zadachite na Bŭlgarskite profesionalni sŭi︠u︡zi vŭv formiraneto i osŭshtestvi︠a︡vaneto na sot︠s︡ialnata politikaBerta Kalaora · First published 1979Open the Tome
Sedemdeset i pet godini revoli͡u︡t͡s︡ionno profsŭi͡u︡zno dvizhenie v Bulgarii͡a︡Berta Kalaora · First published 1979Open the Tome
Partii︠a︡ta i profsŭi︠u︡zite v uslovii︠a︡ta na sot︠s︡ialisticheskoto stroitelstvo v Bŭlgarii︠a︡Berta Kalaora · First published 1978Open the Tome
Velikata Oktomvriĭska sot︠s︡ialisticheska revoli︠u︡t︠s︡ii︠a︡ i profsŭi︠u︡znoto dvizhenie v Bŭlgarii︠a︡Berta Kalaora · First published 1978Open the Tome
Borbite na sofiĭskite rabotnitsi protiv fashizma i kapitalizma 1939-1944Berta Kalaora · First published 1977Open the Tome
History of the Bulgarian Trade unionsVeselin Dimitrov Khadzhinikolov, Berta Kalaora · First published 1977Open the Tome
Georgi Dimitrov and the trade union movementDobrin Michev, Berta Kalaora · First published 1976Open the Tome
Materiali po istoriia na profsuiuznoto dvizhenie v BulgariiaDimitŭr Mladenov, Berta Kalaora · First published 1973Open the Tome
Georgi Dimitrov i profsui︠u︡znoto dvizhenieDobrin Michev, Berta Kalaora, Li͡ubomir Panaĭotov · First published 1972Open the Tome
Istorii︠a︡ na mezhdunarodnoto rabotnichesko i profsŭi︠u︡zno dvizhenieKhristo Mashkov, Berta Kalaora · First published 1900Open the Tome
