Columbia subject headings:
African Americans--Civil rights.
Communism--China--History--20th century.
Pollution.
Social problems--Cross-cultural studies.
Watts Riot, Los Angeles, Calif., 1965.
Harvard subject headings:
African Americans--Civil rights
Communism--China--History--20th century
Pollution.
Social problems--Cross-cultural studies.
Watts Riot, Los Angeles, Calif., 1965.
Princeton subject headings:
African Americans--Civil rights.
Communism--China--History--20th century.
Pollution.
Social problems--Cross-cultural studies.
Watts Riot, Los Angeles, Calif., 1965.