The Kantian roots of contemporary epistemology / Wybe Nico HoukesTechnical functions : on the use and design of artefacts / by Wybo Houkes, P.E. VermaasTechnical functions : on the use and design of artefacts / Wybo Houkes, Pieter E. VermaasTechnical functions : on the use and design of artefacts / Wybo Houkes, Pieter E. Vermaas