Individuals and institutions helping to identify the sitters in the Langhans Collaboration
Taťána Součková (actors and singers), Vlasta Smoláková (of the Theatre Institute, Prague; actors and singers), Věra Brožová (writers), Markéta Hallová (of the Archive of the Prague Conservatoire; musicians), Eva Paulová (musicians), Jindřích Bajgar (musicians), Eduard Stehlík (Institute of Military History; Legionaries), Tomáš Sekyrka (artists), Daniel Franěk (industrialists), Pavel Jákl (industrialists), Jiří Úlovec (Legionaries), Vilém Horák (clergy), Archive of the Academy of Sciences, Prague (academics).