The world almanac and book of facts 2003

 ;

New York : World Almanac Books , 2003

Vital statistics on congress 2001-2002

 Ornstein, Norman J.; Mann, Thomas E.; Malbin, Michael J.;

Washington, D.C. : AEI Press , 2002

Business Statistics: of the Unites States

 Strawser, Cornelia J.;

Lanham, MD : Bernan , 2003

Vital statictics on American politics 2003-2004

 Stanley, Harold W.; Niemi, Richard G.;

Washington, D.C. : CQ Press , 2003