RT Journal Article SR Electronic T1 The state of the art in our profession JF The Journal of Portfolio Management FD Institutional Investor Journals SP 10 OP 12 DO 10.3905/jpm.1974.408489 VO 1 IS 1 A1 James R Vertin YR 1974 UL https://pm-research.com/content/1/1/10.abstract AB