Sonnenfels, Joseph von (BLKÖ)[*][[Sonnenfels, Joseph von (BLKÖ) (entry in the Biographisches Lexikon des Kaiserthums Oesterreich (vol. 35, p. 317))|]]Verificați valoarea |titlelink= (ajutor)
CONOR[*][[CONOR (authority control file for author and corporate names in Slovene system COBISS)|]]Verificați valoarea |titlelink= (ajutor)