Classification
576 - Genetics & evolution
330 - Economics
250
320 - Political science
249
900 - History & geography
241
300 - Social sciences
42
700 - The arts; fine & decorative arts
9
340 - Law
5
140 - Specific philosophical schools
2
100 - Philosophy & psychology
1
343 - Military, tax, trade & industrial law
1
370 - Education
1
973 - United States
1