claystone: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Add new Web site: Federal Institute for Geosciences and Natural Resources - Clay and Claystone Research. | Feb 15, 2016 | ||
| Added new Web site: Mineral Information Institute - Definition of Clay. | Sep 28, 2007 | ||
| Article added to new online database. | Jul 20, 1998 |
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