Columbia subject headings:
Harvard subject headings:
Mussorgsky, Modest Petrovich, 1839-1881
Mussorgsky, Modest Petrovich, 1839-1881--Criticism and interpretation.
Tchaikovsky, Peter Ilich, 1840-1893
Tchaikovsky, Peter Ilich, 1840-1893--Criticism and interpretation.
Princeton subject headings:
Mussorgsky, Modest Petrovich, 1839-1881--Criticism and interpretation.
Tchaikovsky, Peter Ilich, 1840-1893--Criticism and interpretation.