51 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:27:04
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52 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:23:38
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53 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:28:47
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54 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:26:06
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55 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:26:11
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56 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:23:22
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57 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:28:44
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58 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:23:10
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59 | Add to Reading ListSource URL: www.vallen.deLanguage: English - Date: 2015-01-07 15:23:16
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60 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-12-12 02:59:58
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