Columbia subject headings:
Lyricists--United States--History--20th century.
Rock music--United States--1961-1970.
Singers--United States--History--20th century.
Harvard subject headings:
Lyricists--United States--History--20th century.
Rock music--United States
Singers--United States--History--20th century.
Princeton subject headings:
Lyricists--United States--History--20th century.
Rock music--United States--1961-70.
Singers--United States--History--20th century.