RT Journal Article SR Electronic T1 Just give me the Necessary Data, Please! JF The Journal of Portfolio Management FD Institutional Investor Journals SP 47 OP 52 DO 10.3905/jpm.1978.408651 VO 4 IS 4 A1 Leonard H. Lempert YR 1978 UL https://pm-research.com/content/4/4/47.abstract AB