Columbia subject headings:
Harvard subject headings:
Beron, Petŭr, 1940---Interviews.
Bulgaria--Politics and government--1990-
Politicians--Bulgaria--Interviews.
Sŭi͡uz na demokratichnite sili (Bulgaria)--History.
Princeton subject headings:
Beron, Petŭr, 1940---Interviews.
Bulgaria--Politics and government--1990-