Columbia subject headings:
Harvard subject headings:
Biographies
Interviews
Singers--Biography
Singers--Interviews.
Princeton subject headings:
Babalova, Marii︠a︡--Interviews.
Baritones (Singers)--Russia (Federation)--Interviews.
Basses (Singers)--Russia (Federation)--Interviews.
Interviews.
Mezzo-sopranos--Russia (Federation)--Interviews.
Opera--Russia (Federation).
Singers--Russia (Federation)--Interviews.
Sopranos (Singers)--Russia (Federation)--Interviews.
Tenors (Singers)--Russia (Federation)--Interviews.