PT - JOURNAL ARTICLE AU - Robert G. Kirby TI - Lessons learned and never learned AID - 10.3905/jpm.1979.408710 DP - 1979 Oct 31 TA - The Journal of Portfolio Management PG - 52--55 VI - 6 IP - 1 4099 - https://pm-research.com/content/6/1/52.short 4100 - https://pm-research.com/content/6/1/52.full