20thcentury americanhistory architecture arts000 business career cityplanning colonialperiod(1600-1775) disasterrelief disasters economichistory economics general hist014 history historyofeconomics historyoftheamericas hmrt000 humanrights idsc023 landuseplanning nativeamerican planning politicalscience pols000 principlesofrealestate professional publicpolicy realestate regionalplanning socialsciences sociology trade urban urbandesign urbandevelopment urbansociology