. . "Dr. Abraham Silberschein Archive: Personal documentation from the Yoseph Tahon archive including birth certificate, graduation diploma from the Lwow Polytechnicum, affidavit regarding change of his last name from Teitelbaum to Thon, identification card; j"@eng . "Dr. Abraham Silberschein Archive: Personal documentation from the Yoseph Tahon archive including birth certificate, graduation diploma from the Lwow Polytechnicum, affidavit regarding change of his last name from Teitelbaum to Thon, identification card; j"@eng . .