File Indiana statewide, 1968 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 2
File Book 3 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls
File National study of republican county chairmen, 1967 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 3
File Jamaica discussion-simulation/reapportionment, 1968 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 3
File West Virginia, First congressional district, 1968 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 3
File Pennsylvania, Sixth congressional district, 1968 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 3
File New Jersey, Ninth congressional district, 1968 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls » Book 3
File Pennsylvania gubernatorial campaign, 1966 Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls
File Louisiana gubernatorial campaign, 1971 2 volumes Box 10 In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls
File North Carolina 5 volumes In: Walter De Vries Papers, 1960-2012 (majority within 1960-1972) » Polls: Data and analysis » Outstate polls