RT Journal Article SR Electronic T1 Revisions in Earnings Forecasts JF The Journal of Portfolio Management FD Institutional Investor Journals SP 47 OP 52 DO 10.3905/jpm.1979.47 VO 5 IS 4 A1 R. Malcolm Richards A1 John D. Martin YR 1979 UL https://pm-research.com/content/5/4/47.abstract AB