Classification
330 - Economics
6
320 - Political science
5
900 - History & geography
4
616 - Diseases
3
324 - The political process
2
333 - Economics of land & energy
2
370 - Education
2
658 - General management
2
780 - Music
2
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
306 - Culture & institutions
1
341 - Law of nations
1
346 - Private law
1
380 - Commerce, communications & transportation
1
520 - Astronomy & allied sciences
1
600 - Technology
1
610 - Medicine & health
1
612 - Human physiology
1
613 - Personal health & safety
1
615 - Pharmacology & therapeutics
1
617 - Surgery & related medical specialties
1
700 - The arts; fine & decorative arts
1
820 - English & Old English literatures
1