NEWER SURVEILLANCE METHODS IN THE CONTROL OF COMMUNICABLE DISEASE. II. VIRAL HEPATITIS. BASIC PRINCIPLES, WITH SPECIAL REFERENCE TO CZECHOSLOVAKIA.
D003140:Communicable Disease Control; D003141:Communicable Diseases; D003604:Czechoslovakia; D006505:Hepatitis; D006506:Hepatitis A; D006801:Humans
COMMUNICABLE DISEASE CONTROL; CZECHOSLOVAKIA; HEPATITIS, INFECTIOUS