Columbia subject headings:
Harbors--California--Long Beach--History.
Harbors--California--Los Angeles--History.
Port of Long Beach--History.
Harvard subject headings:
Harbors--California--Long Beach--History.
Harbors--California--Los Angeles--History.
Long Beach Harbor (Calif.)--History.
Los Angeles Harbor (Calif.)--History.
Port of Long Beach--History.
Princeton subject headings: