FIGURE 3.4 End uses of helium in the United States, by application, 1975-2001. SOURCE: USGS, 2005b.
FIGURE 3.5 Estimated end uses of helium in the United States for 2007. The shares are the percent of U.S. consumption by volume (MMcf). SOURCE: USGS, 2007.
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Selling the Nation's Helium Reserve . Washington, DC: The National Academies Press,
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