Classification
000 - Computer science, information & general works
700 - The arts; fine & decorative arts
3
333 - Economics of land & energy
2
551 - Geology, hydrology & meteorology
2
100 - Philosophy & psychology
1
320 - Political science
1
330 - Economics
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
620 - Engineering & allied operations
1