2 Ergebnisse für: 716.763
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Esperantaj frazoj traducite in interlingua - YouTube
//www.youtube.com/watch?v=cop3lOMC_-Q
Frazoj el: / Phrases de: http://tatoeba.org/ Traducite in interlingua per Scriptor con adjuta de Laurentio e Carlos.
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A Conversation with Eric Trist - YouTube
https://www.youtube.com/watch?v=OEMaSTOrqBA
Eric Trist discusses his diiscovery of social/technical systems in coal mines in post war England.