Classification
363 - Other social problems & services
62
330 - Economics
52
610 - Medicine & health
40
333 - Economics of land & energy
28
341 - Law of nations
28
362 - Social welfare problems & services
21
338 - Production
17
320 - Political science
15
380 - Commerce, communications & transportation
15
570 - Life sciences; biology
15
327 - International relations
14
600 - Technology
13
700 - The arts; fine & decorative arts
12
340 - Law
11
658 - General management
10
304 - Factors affecting social behavior
9
345 - Criminal law
9
300 - Social sciences
8
344 - Labor, social, education & cultural law
8
370 - Education
8
303 - Social processes
7
551 - Geology, hydrology & meteorology
7
140 - Specific philosophical schools
6
620 - Engineering & allied operations
6
001 - Knowledge
5
332 - Financial economics
5
384 - Communications; telecommunication
5
500 - Natural sciences & mathematics
5
540 - Chemistry & allied sciences
5
000 - Computer science, information & general works
4
170 - Ethics
4
331 - Labor economics
4
337 - International economics
4
343 - Military, tax, trade & industrial law
4
361 - Social problems & social welfare in general
4
364 - Criminology
4
305 - Social groups
3
323 - Civil & political rights
3
342 - Constitutional & administrative law
3
900 - History & geography
3
025 - Library operations
2
306 - Culture & institutions
2
325 - International migration & colonization
2
339 - Macroeconomics & related topics
2
352 - General considerations of public administration
2
378 - Higher education
2
387 - Water, air & space transportation
2
507 - Education, research & related topics
2
629 - Other branches of engineering
2
800 - Literature & rhetoric
2
more ...