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| Utgitt
| Los Angeles : School of Librarianship, University of California , 1967
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| Omfang
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| Opplysninger
| Includes bibliographical references.. - Lecture presented at the University of California, Graduate School of Library Service, Los Angeles, on Apr. 17, and at the School of Librarianship, Berkeley, on Apr. 27, 1967.
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| Emner
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