http://lod.ehri-project-test.eu/institutions/pl-003104/mandates/1 an entity of type: Mandate

Nowadays. The branch of the State Archive of the Capital City of Warsaw in Otwock works on the ground of the Act on National Archival Records and Archives of July 14, 1983, Journal of Law, (Dziennik Ustaw) No 38, 1983.07.19 with later changes. 

data from the linked data cloud