PT - JOURNAL ARTICLE AU - Donald M. Peterson TI - Are Financial Ratios Worth the Effort? AID - 10.3905/jpm.1975.51 DP - 1975 Oct 31 TA - The Journal of Portfolio Management PG - 51--54 VI - 2 IP - 1 4099 - https://pm-research.com/content/2/1/51.short 4100 - https://pm-research.com/content/2/1/51.full