Subfield
- Education229
- Infectious Diseases176
- Political Science and International Relations162
- Safety Research131
- Law122
- Linguistics and Language102
- General Agricultural and Biological Sciences96
- Language and Linguistics91
- Human Factors and Ergonomics87
- Gender Studies85
- Agronomy and Crop Science82
- General Health Professions82
- Public Health, Environmental and Occupational Health81
- Soil Science81
- Parasitology72
- Developmental and Educational Psychology64
- Obstetrics and Gynecology61
- Pediatrics, Perinatology and Child Health56
- Development55
- Waste Management and Disposal53