RT Journal Article SR Electronic T1 Lowry's Reports JF The Journal of Portfolio Management FD Institutional Investor Journals SP 21 OP 27 DO 10.3905/jpm.1977.21 VO 4 IS 1 A1 E. L. Bishop III A1 J. R. Rollins YR 1977 UL https://pm-research.com/content/4/1/21.abstract AB