nepheline syenite: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: USGS. | Jan 16, 2020 | ||
| Media added. | Aug 14, 2008 | ||
| Added new Web site: Official Site of Natural Resources Canada - Nepheline syenite. | Dec 18, 2007 | ||
| Added new Web site: The Canadian Encyclopedia - Nepheline Syenite. | Dec 18, 2007 | ||
| Article revised and updated. | Dec 08, 2006 | ||
| Article added to new online database. | Jul 20, 1998 |
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