Code for classifiers; principles governing the consistent placing of books in a system of classification
| Egile nagusia: | |
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| Erakunde egilea: | |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Chicago
American library association
1939.
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| Edizioa: | 2nd ed. |
| Gaiak: |