PT - JOURNAL ARTICLE AU - Douglas J. Lucas AU - John G. Lonski TI - Changes in Corporate Credit Quality 1970–1990 AID - 10.3905/jfi.1992.408031 DP - 1992 Mar 31 TA - The Journal of Fixed Income PG - 7--14 VI - 1 IP - 4 4099 - https://pm-research.com/content/1/4/7.short 4100 - https://pm-research.com/content/1/4/7.full