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CLC N9
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Chinese Library Classification
A Marxism, Leninism, Mao Zedong Thought and Deng Xiaoping Theory
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B Philosophy, Religion
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C General Social Sciences
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D Politics, Law
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E Military
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F Economics
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G Culture, Science, Education, Sports
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H Language, Writing
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I Literature
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J Art
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K History and Geography
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N General Natural Sciences
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O Mathematical Sciences and Chemistry
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P Astronomy and Earth Sciences
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Q Biological Sciences
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R Medicine, Health
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S Agricultural Sciences
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T Industrial Technology
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U Transportation
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V Aviation and Aerospace
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X Environmental Science, Safety Science
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Z General Books
N-55
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N-7
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N0 Theory and Methodology of Natural Sciences
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N1 Current Status and Development of Natural Sciences
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N2 Natural Science Organizations, Groups, Conferences
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N3 Natural Science Research Methods
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N4 Education and Popularization of Natural Sciences
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N5 Natural Science Series, Anthologies, Serial Publications
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N6 Natural Science Reference Books
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N7 Information Retrieval Tools in Natural Science
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N8 Natural Science Surveys and Investigations
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N9
N91 Natural Research, Natural History
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N93 Nonlinear Science
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N94 System Science
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N99 Information Science, Intelligence Work
Subcategories
This category has the following 2 subcategories, out of 2 total.
CLC N91 Natural Research, Natural History
(3 C)
CLC N94 System Science
(1 C)