File:Helium Map - USGS Minerals Yearbook 2012.png

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Summary

Description	English: Map showing helium-rich gas fields and helium processing plants in the United States, 2012. From USGS.
Date	1 January 2013
Source	US Geological Survey Minerals Yearbook 2012
Author	US Geological Survey

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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