Classification
539 - Modern physics
73
530 - Physics
33
621 - Applied physics
7
535 - Light & infrared & ultraviolet phenomena
6
537 - Electricity & electronics
4
536 - Heat
3
333 - Economics of land & energy
1
531 - Classical mechanics; solid mechanics
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
543 - Analytical chemistry
1