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| grupo de referencia (A group that is associated with another group so that their properties and the properties of the groups and fields they contain always match. If the properties of one group are changed, the other group is updated automatically) | |||
| grupo de referencia | |||
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Reference Group : 13 do fraz, 8 tematyki |
| Elektronika | 2 |
| Finanse | 1 |
| Handel | 1 |
| Linie energetyczne | 1 |
| Opieka zdrowotna | 1 |
| Organizacja narodów zjednoczonych | 5 |
| Technologia informacyjna | 1 |
| Transport | 1 |