Surveys, polls, and samples : Mildred Parten. practical procedures / Parten, Mildred 1902- Social surveys. Public opinion polls. HN29 .P3 1966 309.1 PAS Includes bibliographical references and index. New York : Cooper Square Publishers; 1966. 1966. 1966 Text xii, 624 p. : eng Harper's social science series ;