Classification
520 - Astronomy & allied sciences
59
523 - Specific celestial bodies & phenomena
47
530 - Physics
12
500 - Natural sciences & mathematics
9
576 - Genetics & evolution
4
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
539 - Modern physics
3
572 - Biochemistry
2
700 - The arts; fine & decorative arts
2
004 - Data processing & computer science
1
100 - Philosophy & psychology
1
300 - Social sciences
1
320 - Political science
1
531 - Classical mechanics; solid mechanics
1
540 - Chemistry & allied sciences
1
541 - Physical chemistry
1
550 - Earth sciences
1
900 - History & geography
1