51 | Add to Reading ListSource URL: www.garfield.library.upenn.eduLanguage: English - Date: 1999-10-01 17:39:14
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52 | Add to Reading ListSource URL: www.garfield.library.upenn.eduLanguage: English - Date: 1999-10-01 15:18:27
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53 | Add to Reading ListSource URL: www.garfield.library.upenn.eduLanguage: English - Date: 1999-10-01 16:45:48
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54 | Add to Reading ListSource URL: www.garfield.library.upenn.eduLanguage: English - Date: 1999-10-04 14:34:40
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55 | Add to Reading ListSource URL: lanthanides.tripod.comLanguage: English - Date: 2006-11-06 14:20:35
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56 | Add to Reading ListSource URL: ugadmin.ust.hkLanguage: English - Date: 2014-02-03 23:00:36
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57 | Add to Reading ListSource URL: alchemy.cchem.berkeley.eduLanguage: English - Date: 2014-12-31 11:32:47
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58 | Add to Reading ListSource URL: www.rpi.eduLanguage: English - Date: 2014-04-04 10:36:31
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59 | Add to Reading ListSource URL: www.rose-hulman.eduLanguage: English - Date: 2013-07-09 09:53:47
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60 | Add to Reading ListSource URL: www.rose-hulman.eduLanguage: English - Date: 2013-07-09 09:54:36
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