PT - JOURNAL ARTICLE AU - Richard Williams AU - Peter W. Bacon TI - Efficient portfolios vs. index funds AID - 10.3905/jpm.1978.408661 DP - 1978 Oct 31 TA - The Journal of Portfolio Management PG - 72--74 VI - 5 IP - 1 4099 - https://pm-research.com/content/5/1/72.short 4100 - https://pm-research.com/content/5/1/72.full