21 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 1999-09-20 03:00:00
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22 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-03-01 15:32:55
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23 | Add to Reading ListSource URL: w3.ualg.ptLanguage: English - Date: 2006-11-06 13:21:14
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24 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 1999-01-14 17:44:21
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25 | Add to Reading ListSource URL: www.hou.usra.eduLanguage: English - Date: 2014-06-23 08:39:02
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26 | Add to Reading ListSource URL: woodshole.er.usgs.govLanguage: English - Date: 2007-11-13 08:39:31
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27 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 1998-10-27 16:53:27
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28 | Add to Reading ListSource URL: woodshole.er.usgs.govLanguage: English - Date: 2007-11-13 08:39:35
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29 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2000-01-21 15:46:52
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30 | Add to Reading ListSource URL: repository.azgs.az.govLanguage: English - Date: 2011-06-22 10:51:42
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