Appraisal and Real Estate
Appraisal Institute
Appraisal Institute — Southern California Chapter
American Real Estate Society
Forensic Expert Witness Association
International Right-Of-Way AssociationAppraisal Foundation
Federal Appraisal Subcommittee
Uniform Standards of Professional Appraisal Practice
Uniform Standards for Federal Land Acquisitions (PDF)

Federal & State
US Department of the Interior
US Environmental Protection Agency
CA Bureau of Real Estate

Economic Data
St. Louis Fed – Economic Data
St. Louis Fed – Geographic Economic Data
Yale University – Cowles Foundation for Research in Economics
Federal Reserve
Bureau of Economic Analysis
Bureau of Justice Statistics
Bureau of Labor Statistics
Bureau of Transportation Statistics
Data.gov
Department of Agriculture Economic Research Service
Department of Housing and Urban Planning
Economics and Statistics Administration
National Agricultural Statistics Service
US Census Bureau: Economic Data
Energy Information Administration
EconData.Net