title: Law on the Procedure for Exit from the USSR and Entry into the USSR by Citizens of the USSR [20 May 1991].
mesh_terms: D001519:Behavior; D003710:Demography; D019049:Developed Countries; D004641:Emigration and Immigration; D019359:Knowledge; D007878:Legislation as Topic; D008004:Licensure; D011153:Population; D011157:Population Dynamics; D011996:Records; D014171:Transients and Migrants; D014586:USSR
keywords: Behavior; Demographic Factors; Developed Countries; Emigrants--legal aspects; Knowledge; Laws And Statutes; Migrants; Migration; Permits; Population; Population Dynamics; Travel And Tourism--legal aspects; Travel Documents--legal aspects; Ussr