Columbia subject headings:
Authors, Bulgarian--20th century--Biography.
Ĭovkov, Ĭordan, 1880-1937.
Harvard subject headings:
Authors, Bulgarian--20th century--Biography.
Ĭovkov, Ĭordan, 1880-1937.
Princeton subject headings:
Authors, Bulgarian--20th century--Biography.
Ĭovkov, Ĭordan, 1880-1937.