ഫലകം:PD-USGov-NSF
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This image is a work of a National Science Foundation employee, taken or made during the course of the person's official duties. As a work of the U.S. federal government, the image is in the public domain. |
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This image is a work of a National Science Foundation employee, taken or made during the course of the person's official duties. As a work of the U.S. federal government, the image is in the public domain. |