Modifiche

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nessun oggetto della modifica
Riga 3: Riga 3:  
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== External references ==
 
== External references ==
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* [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] On picks degradation
 
* [http://pickcollecting.presspublisher.us/issue/summer-2010/article/pick-degradation] On picks degradation

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