Columbia subject headings:
Bulgaria--History--1941-1944.
Communists--Bulgaria--Biography.
Poets, Bulgarian--20th century--Biography.
Vapt︠s︡arov, Nikola Ĭonkov, 1909-1942--Trials, litigation, etc.
World War, 1939-1945--Underground movements--Bulgaria.
Harvard subject headings:
Bulgaria--History--1941-1944.
Communists--Bulgaria--Biography
Poets--Biography
Vapt︠s︡arov, Nikola Ĭonkov, 1909-1942
World War, 1939-1945--Underground movements--Bulgaria.
Princeton subject headings: