1945- 20thcentury africanamericanathletes africanamericanstudies africanamericantrackandfieldathletes autobiography bio016000bio010000spo019000soc001000 biography carlos ethnicstudies france) history john mexico) olympics olympicwintergames(10th:1968:grenoble political politicalactivity politicalaspects racerelations recreation socialaspects socialscience sports trackandfieldathletes unitedstates