1066-1485 18th 1945to2000 19thcentury 19thcenturyamericanhistory 20thcentury africanamericanhistory africanamericans atmosphericscience biography britishhistory cabinetmembers civilwarandreconstruction climate climatologyinenviromentalscience courts diplomaticrelations earthscience eastafricanhistory easterneuropeanhistory ethnic executivebranch families familymemoirs firstladies general geology government greatbritain histories law legalhistory localhistory meteorology miscellaneous miscellaneoushistory oceanography politics pre-20thcentury presidentsoftheunitedstates racerelations reconstruction regionalecology state texas trialpractice unitedstates unitedstateshistory