Person · 1987 CEMateusz MasternakAlso known asМастернак, МатеушМатеуш Мастернакماتيوس ماستيرناكマテウシュ・マステルナクarchival plate · Mateusz Masternak · placeholderThis entry is a stub. The Library is awakening — a longer account is being written.Connected to4 links to entries not yet ingested in the Library.