RT Journal Article SR Electronic T1 Factors in New York Stock Exchange security returns, 1931–1979 JF The Journal of Portfolio Management FD Institutional Investor Journals SP 5 OP 19 DO 10.3905/jpm.1982.408884 VO 8 IS 4 A1 William F. Sharpe YR 1982 UL https://pm-research.com/content/8/4/5.abstract AB