Image:Bureau-of-mines seal bw.jpg

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Bureau-of-mines_seal_bw.jpg‎ (115 × 116 pixels, file size: 4 KB, MIME type: image/jpeg)

United States Bureau of Mines seal.

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This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision.

Source: http://www.osha.gov/SLTC/silicacrystalline/dust/symbol_bureau-of-mines_large.jpg

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