Classification
330 - Economics
17
303 - Social processes
9
658 - General management
8
170 - Ethics
6
333 - Economics of land & energy
6
700 - The arts; fine & decorative arts
6
300 - Social sciences
4
320 - Political science
4
331 - Labor economics
4
363 - Other social problems & services
4
380 - Commerce, communications & transportation
4
600 - Technology
4
900 - History & geography
4
174 - Occupational ethics
3
302 - Social interaction
3
306 - Culture & institutions
3
338 - Production
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
820 - English & Old English literatures
3
000 - Computer science, information & general works
2
158 - Applied psychology
2
370 - Education
2
384 - Communications; telecommunication
2
650 - Management & auxiliary services
2
720 - Architecture
2
140 - Specific philosophical schools
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
362 - Social welfare problems & services
1
381 - Commerce
1
530 - Physics
1
570 - Life sciences; biology
1
620 - Engineering & allied operations
1
657 - Accounting
1
813 - American fiction in English
1