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by Bertalanffy, Ludwig von
by Bertalanffy, Ludwig Von
by Lopez, Javier
by Denti Casas, Pablo Julio
by Pena Gonzalez, Saturnino
by Jardon Aguilar, Hildeberto
by Dauner, Enrique
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by Lange, Oskar Richard
by Rohen, Johannes W.; Drecoll, Elke Lutjen