Title: Postoi︠a︡nnoto usŭvŭrshenstvuvane sŭdŭrzhaneto, formite i metodite za obuchenie--vazhno uslovie za podobri︠a︡vane deĭnostta na profsŭi︠u︡znite organi, kadri i aktivisti
Subjects: Employees, Congresses, Training of, Labor unions
Places: Bulgaria