МатематикаAdvances in Telephone Survey MethodologyLilli Japec, N. Clyde Tucker, Edith de Leeuw, Paul J. Lavrakas, James M. Lepkowski, Roberta L. Sangster, J. Michael Brick, Michael W. Link
МатематикаOnline Panel Research. A Data Quality PerspectiveJelke Bethlehem, Mario Callegaro, Anja S. Göritz, Reginald P. Baker, Jon A. Krosnick, Paul J. Lavrakas
