http://www.clemson.edu/caah/history/facultypages/EdMoise/antiwar.html
Also see, James W. Clinton, The Loyal Opposition: Americans in North Vietnam, 1965-1972. Niwot, CO: University Press of Colorado, 1995. xxxii, 310 pp. An oral history of twenty-four individuals.
Herbert Aptheker, with prefaces by Staughton Lynd and Tom Hayden, Mission to Hanoi. New York: International Publishers, 1966. 128 pp. Aptheker (who was a member of the American Communist Party) accompanied Lynd and Hayden (who were not) on a December 1965 trip to Hanoi. -- Michael Pugliese