81 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-12-06 13:41:53
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82 | Add to Reading ListSource URL: lifesciences.ieee.orgLanguage: English - Date: 2014-12-22 10:39:09
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83 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-10-14 15:40:14
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84 | Add to Reading ListSource URL: www.nature.nps.govLanguage: English - Date: 1998-09-02 03:00:00
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85 | Add to Reading ListSource URL: www.bdsv.orgLanguage: English - Date: 2013-12-18 17:22:06
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86 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-09 11:12:20
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87 | Add to Reading ListSource URL: www.epa.gov.Language: English - Date: 2014-04-04 11:19:52
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88 | Add to Reading ListSource URL: celosangeles.ucanr.eduLanguage: English - Date: 2006-12-11 15:15:11
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89 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-12-12 07:01:55
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90 | Add to Reading ListSource URL: www.fws.govLanguage: English - Date: 2012-12-04 16:31:30
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