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== Riferimenti Esterni ==
== Riferimenti Esterni ==
* [https://journals.openedition.org/cahierscfv/799] Quality Matters for Historical Plastics: The Past-Making of Cellulose Nitrates for Future Preservation
* [http://www.getty.edu/conservation/publications_resources/pdf_publications/cellulose_ethers.html] Evaluation of Cellulose Ethers for Conservation
* [http://www.getty.edu/conservation/publications_resources/pdf_publications/cellulose_ethers.html] Evaluation of Cellulose Ethers for Conservation
* [http://pickcollecting.presspublisher.us/issue/summer-2010/article/pick-degradation] Sulla degradazione dei plettri
* [http://pickcollecting.presspublisher.us/issue/summer-2010/article/pick-degradation] Sulla degradazione dei plettri