PT - JOURNAL ARTICLE AU - Clarke, I C TI - Human articular surface contours and related surface depression frequency studies. AID - 10.1136/ard.30.1.15 DP - 1971 Jan 01 TA - Annals of the Rheumatic Diseases PG - 15--23 VI - 30 IP - 1 4099 - http://ard.bmj.com/content/30/1/15.short 4100 - http://ard.bmj.com/content/30/1/15.full SO - Ann Rheum Dis1971 Jan 01; 30