RT Journal Article SR Electronic T1 Lessons learned and never learned JF The Journal of Portfolio Management FD Institutional Investor Journals SP 52 OP 55 DO 10.3905/jpm.1979.408710 VO 6 IS 1 A1 Kirby, Robert G. YR 1979 UL http://jpm.pm-research.com/content/6/1/52.abstract AB