THE OPHTHALMIC OBSERVATIONS OF DAVID LIVINGSTONE.
D000349:Africa; D044383:Black People; D003677:Deficiency Diseases; D005128:Eye Diseases; D049672:History, 19th Century; D066189:Missionaries; D008921:Religious Missions
AFRICA; BIOGRAPHIES; DEFICIENCY DISEASES; EYE DISEASES; HISTORY; HISTORY OF MEDICINE, 19TH CENT.; MISSIONS AND MISSIONARIES; NEGROES