In 1948, Dreesen was admitted to the Folkwang Universitat der Kunste, Essen, Germany and commenced his studies in fine arts.
Willi Baumeister | Willi Forst | Willi Sänger | Willi Plett | Willi Lippens | Willi Williams | Willi van Ooyen | Willi Hennig | Willi Braun | Chilli Willi and the Red Hot Peppers | 40. Fallschirmjägerbataillon Willi Sänger | Willi Weber | Willi Veller | Willi Stöhr | Willi Reschke | Willi Oberbeck | Willi Ninja | Willi Kronhardt | Willi Hennig Society | Willi Gerdau | Willi Frommelt | Willi Fels | Willi Arlt |