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| Riferimenti: | | Riferimenti: |
− | [http://pencils.wikia.com/wiki/L%26C_Hardtmuth], [http://en.wikipedia.org/wiki/Koh-i-Noor_Hardtmuth], [http://it.wikipedia.org/wiki/Koh-I-Noor_Hardtmuth] | + | [http://pencils.wikia.com/wiki/L%26C_Hardtmuth], [http://en.wikipedia.org/wiki/Koh-i-Noor_Hardtmuth], [http://it.wikipedia.org/wiki/Koh-I-Noor_Hardtmuth], [https://www.kohinoorusa.com/about], [https://collection.sciencemuseumgroup.org.uk/people/cp118887/l-c-hardtmuth], [https://forum.fountainpen.it/viewtopic.php?t=32043] |
− | <noinclude>
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− | {{BrandData|Founder=Joseph Hardtmudt|Date=1790|ProdDate=1990|Place=Vienna|Country=AT}}
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