 | Felt 050 Library of Congress klassifikation (multiMARC) | Felt 070 National Agricultural Library klassifikation (multiMARC) |  |
Felt 060 National Library of Medicine klassifikation
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Felt 060 National Library of Medicine klassifikation
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Felt 060 forekommer i poster fra National Library of Medicine (multiMARC), men anvendes også af en række medicinske biblioteker i Danmark.
