An pagkakaiba han mga rebisyon han "Bulawan"
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Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.7 |
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* [http://www.lateralscience.co.uk/gold/auriferous.html ''Getting Gold'' 1898 book], www.lateralscience.co.uk
* {{Wayback |date=20080307000911 |url=http://www.epa.gov/epaoswer/other/mining/techdocs/gold.pdf |archiveurl=http://web.archive.org/web/20080307000911/http://www.epa.gov/epaoswer/other/mining/techdocs/gold.pdf |archivedate=2008-03-07 |title=Technical Document on Extraction and Mining of Gold }}, www.epa.gov
* [http://www.pniok.de/au.htm Picture in the Element collection from Heinrich Pniok] {{Webarchive|url=https://web.archive.org/web/20121029163833/http://www.pniok.de/au.htm |date=2012-10-29 }}, www.pniok.de
*[http://libmma.contentdm.oclc.org/cdm/compoundobject/collection/p15324coll10/id/119785/rec/1 The Art of Precolumbian Gold: The Jan Mitchell Collection], an exhibition catalog from The Metropolitan Museum of Art (fully available online as PDF)
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