Subject

• Citizenship -- United States -- Law and legislation 10
• Citizenship -- United States 10
• Personal correspondence 8
• Hirsch, Siegfried, 1878-1970 6
• Political prisoners -- Germany -- 20th century 4
• Strafanstalt Plötzensee 4
• Neuburger, George R. F. -- Correspondence 3
• Germany -- Politics and government -- 1933-1945 2
• Sugarman, Catherine, 1917-2016 -- Correspondence 2
• Biographies 1
• Death 1
• Ernst, Irving 1
• Germany -- History -- 1933-1945 1
• Hirsch, Siegfried, 1878-1940 -- Correspondence 1
• Koebel, Eberhard, 1907-1955. -- Correspondence 1
• Kommunistische Partei Deutschlands 1
• Ottenberg, Irving S., 1883-1969 1