| Original content here is published under these license terms: | X |
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| License Type: | Attribution, No derivative work | |
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| License Abstract: | You may copy this content and re-publish it in unmodified form, provided you include an overt attribution to the author(s). You are not permitted to create derivative works. |
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| License URL: | https://creativecommons.org/licenses/by-nd/3.0/ |
