Classification
551 - Geology, hydrology & meteorology
16
550 - Earth sciences
12
333 - Economics of land & energy
10
570 - Life sciences; biology
10
621 - Applied physics
10
001 - Knowledge
9
300 - Social sciences
9
363 - Other social problems & services
3
530 - Physics
3
526 - Mathematical geography
2
620 - Engineering & allied operations
2
158 - Applied psychology
1
330 - Economics
1
500 - Natural sciences & mathematics
1
519 - Probabilities & applied mathematics
1
520 - Astronomy & allied sciences
1
531 - Classical mechanics; solid mechanics
1
534 - Sound & related vibrations
1
536 - Heat
1
541 - Physical chemistry
1
546 - Inorganic chemistry
1
549 - Mineralogy
1
577 - Ecology
1
624 - Civil engineering
1
910 - Geography & travel
1