????? ?? ?? ?? ??????? ??? ???? ??????? ???????? ?? ???? ?? books ?? ???? ??? ??????? ??????? ?? ?? ??????? ?? ????? ????? ?? ????? ??????? ??? ???????? ?? ??? ?? ?? ???? ???? ??? ????? ?? ??? ??????? ????? ??? ?? ?? ??? ??????? ??????? ??? ?????? ??? Bogle was a huge proponent of purchasing index resources and retaining expenses to a minimum, all