11 | Add to Reading ListSource URL: www.physics.ncat.eduLanguage: English - Date: 2007-04-15 10:23:27
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12 | Add to Reading ListSource URL: www.nist.govLanguage: English - Date: 2013-09-30 14:01:18
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13 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-11-11 12:23:48
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14 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-11-11 12:25:38
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15 | Add to Reading ListSource URL: www.aznano.orgLanguage: English - Date: 2014-01-08 05:02:59
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16 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-06-01 10:55:07
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17 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2011-11-11 12:01:15
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18 | Add to Reading ListSource URL: www.lpi.usra.eduLanguage: English - Date: 2012-07-16 14:33:30
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19 | Add to Reading ListSource URL: simion.comLanguage: English - Date: 2009-11-24 02:34:05
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20 | Add to Reading ListSource URL: www.cheric.orgLanguage: English - Date: 2006-07-03 00:31:00
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