Columbia subject headings:
Communists--Bulgaria--Biography.
Guerrillas--Bulgaria--Biography.
Plevan Region (Bulgaria)--History.
Popov, B. (Boris)
World War, 1939-1945--Personal narratives, Bulgarian.
World War, 1939-1945--Underground movements--Bulgaria--Plevan Region--Biography.
Harvard subject headings:
Communists--Bulgaria--Biography
Guerrillas--Bulgaria--Biography
Plevan Region (Bulgaria)--History.
Popov, B. (Boris)
World War, 1939-1945--Personal narratives, Bulgarian.
World War, 1939-1945--Underground movements--Bulgaria--Pleven Region--Biography.
Princeton subject headings: