Pagkukulay sa litrato: Pagkakaiba sa mga binago
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AnakngAraw (usapan | ambag) linis |
m Bot: Migrating 3 interwiki links, now provided by Wikidata on d:q166509 (translate me) |
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* [http://www.cr.nps.gov/museum/publications/conserveogram/conserv.html National Park Service. Conserve-O-Gram (select PDF versions on menu)]
* [http://www.wilhelm-research.com Henry Wilhelm]
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