Materia
R Medicine (General)
RZ Other systems of medicine
RA0421 Public health. Hygiene. Preventive Medicine
11
RA Public aspects of medicine
8
RK Dentistry
4
RT Nursing
4
RC Internal medicine
3
L Education (General)
2
LB2300 Higher Education
2
HN Social history and conditions. Social problems. Social reform
1
N Visual arts (General) For photography, see TR
1
QC Physics
1