Columbia subject headings:
Radio broadcasting--Mexican-American Border Region.
Radio stations--Mexican-American Border Region.
Harvard subject headings:
Country music
Old-time music.
Radio broadcasting--Mexican-American Border Region--History.
Radio broadcasting--Mexican-American Border Region.
Radio commercials.
Radio program excerpts.
Radio stations--Mexican-American Border Region--History.
Radio stations--Mexican-American Border Region.
Princeton subject headings: