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- lcsh's%3a%22Distance education %2f great britain%22 2
- lcsh's%3a%22Distance education %2f great brittain%22 2
- lcsh's%3a%22Distance education %2f groat britain%22 2
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Unesco thesaurus : a structured list of descriptors for indexing and retrieving literature in the fields of education, science, social science, culture and communication (1977)
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Lancaster, F.W.: Vocabulary control for information retrieval (1986)
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- 22. 4.2007 10:07:51