1881-1965 20thcentury africanamericanbaseballplayers africanamericans baseball baseballplayers baseballteamowners biography branch carl casestudies conductoflife discriminationinsports friendsandassociateserskine history historybrooklyndodgers(baseballteam) influencerobinson jackie juvenileliterature racerelations religion religionrickey religionrobinson rickey robinson unitedstates