Classification
100 - Philosophy & psychology
400 - Language
3
500 - Natural sciences & mathematics
3
333 - Economics of land & energy
2
370 - Education
2
900 - History & geography
2
340 - Law
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
410 - Linguistics
1
700 - The arts; fine & decorative arts
1
780 - Music
1