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Wellisch, H.H.: ¬The Universal Decimal Classification : a programmed instruction course (1970)
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- Imprint
- College Park, Md. : Univ. of Maryland. School of Library and Information Services
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Wellisch, H.H.: Indexing from A to Z (1991)
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Wellisch, H.H.: Indexing from A to Z (1996)
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Wellisch, H.H.: Indexing from A to Z (1995)
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