@techreport{DeBell2009,
author = {DeBell, M. and Krosnick, J.A. and Lupia, A. and Roberts, C.},
title= {User’s guide to the advance release of the 2008–2009 ANES Panel Study},
year = {2009},
URL = {http://www.websm.org/uploadi/editor/1400256378deBell_2009_User_Guide.pdf},
publisher = {Stanford University and the University of Michigan},
address = {Palo Alto, CA, and Ann Arbor, MI},
}