U.S. Coast Guard, Pollution Incidents In and Around U.S. Waters, a Spill/Rele...

U.S. Environmental Protection Agency, National Emissions Inventory (NEI) Air ...

Franklin Associates, a Division of ERG, Prairie Village, KS, Municipal Solid ...

U.S. Government Accountability Office, Hazardous Waste Programs: Information ...

Environmental Business International, Inc., San Diego, CA, Environmental Busi...

U.S. National Oceanic and Atmospheric Administration, [tbf]Source: U.S. Natio...

American National Election Studies (copyright). __referenced on dataset secti...

Through 2002, Congressional Quarterly Inc., Congressional Quarterly Weekly Re...

Except as noted, compiled by U.S. Census Bureau from data published in Congre...

Except as noted, compiled by U.S. Census Bureau from data published in Congre...