English: Poll on American attitudes towards the Vietnam War between May 1966 and May 1971.
Data source: Gallup, George, ed. The Gallup Poll: Public Opinion 1935 to 1971. Vol. 3, 1957-1971. Random, 1972.
Español: Encuesta sobre la actitud de los estadounidenses hacia la guerra de Vietnam entre mayo de 1966 y mayo de 1971.
Fuente de los datos: Gallup, George, ed. The Gallup Poll: Public Opinion 1935 to 1971. Vol. 3, 1957-1971. Random, 1972.
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