51 | Add to Reading ListSource URL: gamification-research.orgLanguage: English - Date: 2015-03-30 17:53:38
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52 | Add to Reading ListSource URL: www.cmu.eduLanguage: English - Date: 2015-05-19 14:31:30
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53 | Add to Reading ListSource URL: energy.columbia.eduLanguage: English - Date: 2012-11-13 16:41:45
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54 | Add to Reading ListSource URL: www.cmu.eduLanguage: English - Date: 2015-02-10 08:44:52
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55 | Add to Reading ListSource URL: lx2.saas.hku.hkLanguage: English - Date: 2014-10-30 03:52:28
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56 | Add to Reading ListSource URL: www.bm.ust.hkLanguage: English - Date: 2007-02-02 01:28:57
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57 | Add to Reading ListSource URL: www.princeton.eduLanguage: English - Date: 2014-07-21 11:07:35
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58 | Add to Reading ListSource URL: www.clp.com.hkLanguage: English - Date: 2015-03-12 05:56:24
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59 | Add to Reading ListSource URL: hkumath.hku.hkLanguage: English - Date: 2015-03-26 02:24:36
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60 | Add to Reading ListSource URL: www.cmu.eduLanguage: English - Date: 2015-04-06 10:08:54
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