Columbia subject headings:
Authors, Bulgarian--Biography.
Konstantinov, Aleko, 1863-1897.
Mikhaĭlovski, Stoi︠a︡n, 1856-1927.
Stamatov, G. P. (Georgi Porfirievich), 1869-1942.
Harvard subject headings:
Konstantinov, Aleko, 1863-1897.
Mikhaĭlovski, Stoi︠a︡n, 1856-1927.
Stamatov, G. P. (Georgi Porfirievich), 1869-1942.
Princeton subject headings: