Title: Protection of labour in the U.S.S.R.
Subjects: Labor laws and legislation, Vsesoi︠u︡znyĭ sʺezd professionalʹnykh soi︠u︡zov. http://id.loc.gov/authorities/names/n50077028, Vsesoi︠u︡znyĭ sʺezd professionalʹnykh soi︠u︡zov
Places: Soviet Union