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| | Encyclopedia: Electret |
 | | The article on electrical energy is located elsewhere. |
| | Star City [W. Va.], Electret Scientific Co. [1973]. |
| | Gross, Bernhard, "Charge storage in solid dielectrics; a bibliographical review on the electret and related effects". |
| www.nationmaster.com /encyclopedia/Electret (434 words) |
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