Columbia subject headings:
Czechoslovakia--History--Intervention, 1968--Pictorial works.
Documentary photography--Czechoslovakia.
Prague (Czech Republic)--History--20th century--Pictorial works.
Harvard subject headings:
Czechoslovakia--History--Intervention, 1968--Pictorial works.
Czechoslovakia--History--Intervention, 1968.
Documentary photography--Czechoslovakia.
Nineteen sixty-eight, A.D.
Princeton subject headings:
Czechoslovakia--History--Intervention, 1968--Pictorial works.
Documentary photography--Czechoslovakia.
Prague (Czech Republic)--History--20th century--Pictorial works.