RT Journal Article SR Electronic T1 A Brief History of MPT JF The Journal of Investing FD Institutional Investor Journals SP 18 OP 23 DO 10.3905/joi.3.4.18 VO 3 IS 4 A1 George M. Frankfurter A1 Herbert E. Phillips YR 1994 UL https://pm-research.com/content/3/4/18.abstract AB