Classification
500 - Natural sciences & mathematics
330 - Economics
24
362 - Social welfare problems & services
19
306 - Culture & institutions
17
658 - General management
17
300 - Social sciences
14
338 - Production
14
331 - Labor economics
10
361 - Social problems & social welfare in general
8
302 - Social interaction
7
332 - Financial economics
6
620 - Engineering & allied operations
6
363 - Other social problems & services
4
001 - Knowledge
3
304 - Factors affecting social behavior
3
384 - Communications; telecommunication
3
307 - Communities
2
320 - Political science
2
333 - Economics of land & energy
2
380 - Commerce, communications & transportation
2
670 - Manufacturing
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
153 - Mental processes & intelligence
1
158 - Applied psychology
1
301 - Sociology & anthropology
1
303 - Social processes
1
336 - Public finance
1
343 - Military, tax, trade & industrial law
1
344 - Labor, social, education & cultural law
1
350 - Public administration & military science
1
368 - Insurance
1
370 - Education
1
381 - Commerce
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
610 - Medicine & health
1
657 - Accounting
1
700 - The arts; fine & decorative arts
1
900 - History & geography
1