1. Incidence of calculi in the gall-bladder as met with in 1600 necropsies;Mitchell;Ann. Surg.,1918
2. Cholelithiasis in the Korean;Ludlow;Surg. Gynec. & Obst.,1930
3. Cholelithiasis: a statistical study with special reference to its frequency in the colored race;Jaffe;J. Lab. & Clin. Med.,1933
4. Incidence of cholelithiasis in the Negro as compared with the white;Windley;Gastroenterology,1948
5. Carcinoma of the gallbladder and cholelithiasis on the Witwatersrand: an autopsy survey of the racial incidence;Becker;South African J. Clin. Sc.,1952