Columbia subject headings:
Colombia--Politics and government--1930-1946.
Colombia--Politics and government--1946-1974.
Government publicity--Colombia--History--20th century.
Radio broadcasting policy--Colombia--History.
Radio broadcasting--Political aspects--Colombia--History.
Radiodifusora Nacional de Colombia--History.
Harvard subject headings:
Broadcasting policy--Colombia--20th century.
Colombia--Politics and government--1930-1946.
Colombia--Politics and government--1946-1974.
Radio broadcasting--Colombia--20th century.
Radiodifusora Nacional de Colombia--History.
Princeton subject headings:
Broadcasting policy--Colombia--History--20th century.
Colombia--Cultural policy--History--20th century.
Colombia--Politics and government--1930-1946.
Colombia--Politics and government--1946-1974.
Public radio--Colombia--History--20th century.
Radio broadcasting--Colombia--History--20th century.
Radio in politics--Colombia--History--20th century.
Radiotelevisora Nacional de Colombia--History.