Classification
363 - Other social problems & services
330 - Economics
3
333 - Economics of land & energy
3
600 - Technology
3
370 - Education
2
551 - Geology, hydrology & meteorology
2
610 - Medicine & health
2
900 - History & geography
2
000 - Computer science, information & general works
1
300 - Social sciences
1
340 - Law
1
360 - Social problems & services; associations
1
500 - Natural sciences & mathematics
1
620 - Engineering & allied operations
1
700 - The arts; fine & decorative arts
1