1901to1945 1917-1991 19thcentury 20thcentury activists africanamericanbiography africanamericans americans americas astronomy australianhistory biography biographyreference canadian civilwar criminals criminology cultures description descriptions development espionage ethnic executivebranch familymemoirs fiction frenchhistory general government historicalbiogr historicalbiography history inventors judicialbranch laborleaders latinos/hispanics lawenforcement leadership legalfigures legislativebranch management memoir militarybiography minoritystudies miscellaneous miscellaneouslaw miscellaneousmi miscellaneousworld miscellaneousworldhistory murder naturalists northamericantravel peoples plains politicalacti politicalbiography politics puertoricans racerelations regionalbiography rockymountainregion scientists socialreformers southernregion supremecourt travelessays truecrime unitedstates unitedstatesarmedforces unitedstateshistory unitedstatesstudies western westwardmigration women'sbiography