Classification
330 - Economics
306
320 - Political science
275
333 - Economics of land & energy
111
820 - English & Old English literatures
78
370 - Education
68
300 - Social sciences
65
900 - History & geography
53
610 - Medicine & health
42
840 - Literatures of Romance languages
38
304 - Factors affecting social behavior
31
336 - Public finance
30
380 - Commerce, communications & transportation
28
363 - Other social problems & services
27
630 - Agriculture & related technologies
26
576 - Genetics & evolution
24
340 - Law
13
600 - Technology
10
100 - Philosophy & psychology
4
170 - Ethics
4
200 - Religion
4
440 - Romance languages; French
4
940 - History of Europe
4
130 - Parapsychology & occultism
3
280 - Christian denominations & sects
3
338 - Production
3
360 - Social problems & services; associations
3
910 - Geography & travel
3
010 - Bibliography
2
240 - Christian moral & devotional theology
2
260 - Social & ecclesiastical theology
2
341 - Law of nations
2
350 - Public administration & military science
2
390 - Customs, etiquette & folklore
2
500 - Natural sciences & mathematics
2
510 - Mathematics
2
790 - Recreational & performing arts
2
270 - History of Christianity & Christian church
1
301 - Sociology & anthropology
1
322 - Relation of state to organized groups
1
331 - Labor economics
1
346 - Private law
1
450 - Italian, Romanian & related languages
1
460 - Spanish & Portuguese languages
1
640 - Home & family management
1
650 - Management & auxiliary services
1
658 - General management
1
680 - Manufacture for specific uses
1
700 - The arts; fine & decorative arts
1
730 - Plastic arts; sculpture
1
750 - Painting & paintings
1
more ...