RA0421 Public health. Hygiene. Preventive Medicine 49 TX341-641 Nutrition. Foods and food supply 33 TP368-456 Food processing and manufacture 30 R Medicine 6 RA643-645 Disease (Communicable and noninfectious) and public health 5 P1-1091 Philology. Linguistics(General) 4 R5-130.5 General works 4 L Education (General) 2 LB2300 Higher Education 2 R5-920 Medicine (General) 2 RA Public aspects of medicine 2 BF1-1999 Psychology, Parapsychology, Occult Sciences 1 BP174-190 The practice of Islam 1 HD101-1395.5 Land use Land tenure 1 HM Sociology 1 HV Social pathology. Social and public welfare 1 K Law 1 LC5800-5808 Distance education 1 QD71-142 Analytical chemistry 1 QL614-639.8 Fishes 1 R Medicine (General) 1 RA1190-1270 Toxicology. Poisons 1 RB Pathology 1 RC Internal medicine 1 RC31-1245 Internal medicine 1 RK Dentistry 1 TC401-506 River, lake, and water-supply engineering (General) 1 TS195-198.8 Packaging 1 TX901-946.5 Hospitality industry. Hotels, clubs, restaurants, etc. Food service 1