Classification
333 - Economics of land & energy
363 - Other social problems & services
3
414 - Phonology & phonetics
000 - Computer science, information & general works
2
320 - Political science
2
330 - Economics
2
370 - Education
2
380 - Commerce, communications & transportation
2
700 - The arts; fine & decorative arts
2
900 - History & geography
2
140 - Specific philosophical schools
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
600 - Technology
1
610 - Medicine & health
1