October15,1970wasdeclaredInternationalWhiteCaneSafetyDa...
问题详情:October15,1970wasdeclaredInternationalWhiteCaneSafetyDay(IWCSD)forthefirsttimebythePresidentoftheInternationalFederationoftheBlind(IFB).ThisdatewasadoptedatthefirstconventionoftheIFB,heldinColomboonO...