RT Journal Article SR Electronic T1 Duration as a link between yield and value JF The Journal of Portfolio Management FD Institutional Investor Journals SP 97 OP 98 DO 10.3905/jpm.1984.408981 VO 11 IS 1 A1 Guilford C. Babcock YR 1984 UL https://pm-research.com/content/11/1/97.abstract AB