Classification
539 - Modern physics
136
530 - Physics
10
621 - Applied physics
10
333 - Economics of land & energy
4
541 - Physical chemistry
4
520 - Astronomy & allied sciences
3
620 - Engineering & allied operations
2
523 - Specific celestial bodies & phenomena
1
550 - Earth sciences
1
601 - Philosophy & theory
1
650 - Management & auxiliary services
1