Classification
320 - Political science
32
330 - Economics
13
900 - History & geography
12
306 - Culture & institutions
9
700 - The arts; fine & decorative arts
5
300 - Social sciences
4
370 - Education
4
940 - History of Europe
4
327 - International relations
3
338 - Production
3
361 - Social problems & social welfare in general
3
304 - Factors affecting social behavior
2
324 - The political process
2
331 - Labor economics
2
335 - Socialism & related systems
2
363 - Other social problems & services
2
379 - Public policy issues in education
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
155 - Differential & developmental psychology
1
301 - Sociology & anthropology
1
302 - Social interaction
1
307 - Communities
1
333 - Economics of land & energy
1
337 - International economics
1
340 - Law
1
352 - General considerations of public administration
1
362 - Social welfare problems & services
1
364 - Criminology
1
378 - Higher education
1
430 - Germanic languages; German
1
501 - Philosophy & theory
1
509 - Historical, geographic & persons treatment
1
576 - Genetics & evolution
1
610 - Medicine & health
1
658 - General management
1
791 - Public performances
1
951 - China & adjacent areas
1