A HISTORICAL TREND IN TROPICAL MEDICINE.
D006664:History; D049672:History, 19th Century; D006801:Humans; D009787:Occupational Medicine; D011315:Preventive Medicine; D012936:Social Medicine; D014330:Tropical Medicine
HISTORY; HISTORY OF MEDICINE, 19TH CENT.; INDUSTRIAL MEDICINE; PREVENTIVE MEDICINE; SOCIAL MEDICINE; TROPICAL MEDICINE