In J. M. Lepkowski & C. Tucker & J. M. Brick & E. de Leeuw & L. Japac & P. J. Lavrakas & M. W. Link & R. L. Sangster (Eds.), Advances in Telephone Survey Methodology. New York: John Wiley Company
Data has been last edited on Feb 28 2013
Data has been last edited on Feb 28 2013