Materia
HN Social history and conditions. Social problems. Social reform
167
H Social Sciences (General)
57
HQ The family. Marriage. Woman
48
D History (General)
38
HV Social pathology. Social and public welfare
33
HC Economic History and Conditions
30
HM Sociology
25
K Law (General)
20
QH Natural history
20
F1201 Latin America (General)
19
L Education (General)
19
BF Psychology
15
PN0441 Literary History
15
HISTORIA
13
HISTORY
13
HT Communities. Classes. Races
13
LB2300 Higher Education
13
QH301 Biology
13
RA0421 Public health. Hygiene. Preventive Medicine
13
Q Science (General)
12
QL Zoology
12
G Geography (General)
11
R Medicine (General)
10
RA Public aspects of medicine
10
PN Literature (General)
9
PN0080 Criticism
9
HF Commerce
8
LB1603 Secondary Education. High schools
8
JA Political science (General)
7
GT Manners and customs
6
HD Industries. Land use. Labor
6
LC Special aspects of education
6
COSTA RICA
5
E11 America (General)
5
GE Environmental Sciences
5
HB Economic Theory
5
HJ Public Finance
5
JZ International relations
5
M Music
5
NA Architecture
5
B Philosophy (General)
4
GF Human ecology. Anthropogeography
4
GR Folklore
4
HG Finance
4
J General legislative and executive papers
4
LA History of education
4
LB2361 Curriculum
4
P Philology. Linguistics
4
RT Nursing
4
C Auxiliary sciences of history (General)
3
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