. . "Memoirs of Leon John Bortniker, born in Vienna, Austria, 1919, regarding his experiences in Vienna until his emigration to the United States, 1939\n\nMemoirs of Leon John Bortniker"@eng . "Memoirs of Leon John Bortniker, born in Vienna, Austria, 1919, regarding his experiences in Vienna until his emigration to the United States, 1939\n\nMemoirs of Leon John Bortniker"@eng . .