Select a description to see subdivisions
| Code |
Description |
Items |
| 550 |
Earth sciences |
0 |
| 551 |
Geology, hydrology, meteorology
|
1 |
| 552 |
Petrology |
0 |
| 553 |
Economic geology |
0 |
| 554 |
Earth sciences of Europe |
0 |
| 555 |
Earth sciences of Asia |
0 |
| 556 |
Earth sciences of Africa |
0 |
| 557 |
Earth sciences of North America |
0 |
| 558 |
Earth sciences of South America |
0 |
| 559 |
Earth sciences of other areas |
0 |
