TY - BOOK AU - Sudman, Seymour. AU - Bradburn, Norman M., ED - ED - ED - ED - SN - 0875895468 (hardcover) SN - 2 PY - 1982///.46 CY - San Francisco PB - Jossey-Bass Publishers KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Research KW - Social sciences;Questionnaires N1 - Includes index; 5; Professional ER -