51![HELIUM By Norbert Pacheco1 Grade-A helium[removed]% or better purity) sales volumes by](https://www.pdfsearch.io/img/8783096b5535c71ea12f20db7ce80966.jpg "HELIUM By Norbert Pacheco1 Grade-A helium[removed]% or better purity) sales volumes by") | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-04-19 10:56:18
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52 | Add to Reading ListSource URL: www.ksdot.orgLanguage: English - Date: 2009-04-28 10:25:11
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53 | Add to Reading ListSource URL: www.ksdot.orgLanguage: English - Date: 2004-10-25 16:24:03
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54 | Add to Reading ListSource URL: www.ksdot.orgLanguage: English - Date: 2006-10-30 09:41:40
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55 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-01-24 11:10:09
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56 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-01-30 09:53:06
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57 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-17 13:41:56
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