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

50 Generalities about the pure sciences
51 Mathematics
52 Astronomy. Astrophysics. Space research. Geodesy
53 Physics
54 Chemistry. Crystallography. Mineralogy
55 Earth sciences. Geology, meteorology, etc.
56 Palaeontology
57 Biological sciences in general
58 Botany

59

 Zoology

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