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Plädoyer für praxisnähere Philosophie Lenk, H. 1980. Was ist Philosophie? Neuere Texte zu ihrem Selbstverständnis. Hrsg.: K. Salamun, 252–260, Mohr Siebeck
Duration of sleep depending on the type of shiftwork Knauth, P.; Rutenfranz, J.; Landau, K.; Dröge, C.; Schwitteck, M.; Widynski, M. 1980. International Archives of Occupational and Environmental Health, 46 (2), 167–177