free energy: References & Edit History
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Added cross-references. | Jun 15, 2022 | ||
| Add new Web site: Fact Monster - Science - Free Energy. | Jan 05, 2012 | ||
| Article revised and updated. | Sep 28, 2006 | ||
| Article added to new online database. | Jul 20, 1998 |
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