. "folder\n\n1"@en . . . . . . "Postcard"@en . "The postcard was written by Hugo Koenig [donor's sister's father-in-law] in Birkenau concentration camp \"bei Neu-Berlin ober Schlesie\") and sent to Kremsier (Kromeríz), Czech Republic."@en . "United States Holocaust Memorial Museum"@en . . . "irn516321" . .