Columbia subject headings:
Chekhov, Anton Pavlovich, 1860-1904.
Tchaikovsky, Peter Ilich, 1840-1893.
Harvard subject headings:
Chekhov, Anton Pavlovich, 1860-1904
Tchaikovsky, Peter Ilich, 1840-1893
Princeton subject headings:
Chekhov, Anton Pavlovich, 1860-1904.
Tchaikovsky, Peter Ilich, 1840-1893.