Materia
BF Psychology
300
L Education (General)
50
LB2300 Higher Education
38
R Medicine (General)
33
LC Special aspects of education
25
RA0421 Public health. Hygiene. Preventive Medicine
25
HM Sociology
22
HN Social history and conditions. Social problems. Social reform
21
HV Social pathology. Social and public welfare
21
HQ The family. Marriage. Woman
20
RA Public aspects of medicine
20
H Social Sciences (General)
19
LB1603 Secondary Education. High schools
13
RJ101 Child Health. Child health services
12
LB1501 Primary Education
10
RJ Pediatrics
7
RT Nursing
7
RZ Other systems of medicine
7
LB Theory and practice of education
6
T Technology (General)
6
B Philosophy (General)
5
HD Industries. Land use. Labor
5
K Law (General)
5
RC0254 Neoplasms. Tumors. Oncology (including Cancer)
5
RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine
4
RC Internal medicine
4
AC Collections. Series. Collected works
3
BJ Ethics
3
HD28 Management. Industrial Management
3
LB2361 Curriculum
3
QP Physiology
3
RB Pathology
3
RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
3
RM Therapeutics. Pharmacology
3
HA Statistics
2
HC Economic History and Conditions
2
JA Political science (General)
2
LC5201 Education extension. Adult education. Continuing education
2
LE Individual institutions (America except United States)
2
NA Architecture
2
ND Painting
2
NX Arts in general
2
BC Logic
1
BD Speculative Philosophy
1
GN Anthropology
1
GT Manners and customs
1
HF Commerce
1
HT Communities. Classes. Races
1
JF Political institutions (General)
1
N Visual arts (General) For photography, see TR
1
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