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UDC Consortium, PO Box 90407, 2509 LK The Hague, The Netherlands Tel.: (+31) 70 314 0509 Fax: (+31) 70 314 0667 E-mail: udc@kb.nl | ||||||||||
5
Mathematics and natural sciences
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| 520 | Astronomical instruments and techniques |
| 521 | Theoretical astronomy. Celestial mechanics |
| 523 | The Solar System |
| 524 | Stars. Stellar system. The Universe |
| 528 | Geodesy. Surveying. Photogrammetry. Remote sensing, Cartography |
About UDC |
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