 | en Waanzin: een Encyclopedie der Pseudo-Wetenschappen (1997), with Marcel Hulspas. ISBN 9789044502787; Discrete wiskunde (1991), with Jack H. van Lint... 14 KB (1,187 words) - 03:58, 22 May 2023 |
nautische verhalen met een vleugje astronomie". New Scientist (in Dutch). Hulspas, Marcel (26 May 2022). "Historicus Siebren van der Werf beschrijft hoe mensen... 2 KB (202 words) - 21:28, 30 November 2022 |
and foremost task of our magazine." From 1988 until 2002, astronomer Marcel Hulspas [nl] was editor-in-chief, and when he was succeeded by Rob Nanninga... 6 KB (528 words) - 03:31, 21 September 2022 |
 | crop circles and UFOs kept Nanninga and his colleagues (especially Marcel Hulspas) busy. Several times Nanninga explained in Skepter and to the press... 36 KB (3,882 words) - 22:27, 17 March 2023 |
Conference 1990". Skepter (in Dutch). 3 (4). Stichting Skepsis: 30–31. Hulspas, Marcel (December 1991). "Van APE-mensen tot wijntherapie. Het derde Euroskeptics... 28 KB (2,149 words) - 17:55, 29 December 2023 |
 | Conference 1990". Skepter (in Dutch). 3 (4). Stichting Skepsis: 30–31. Hulspas, Marcel (December 1991). "Van APE-mensen tot wijntherapie. Het derde Euroskeptics... 27 KB (1,858 words) - 16:09, 14 December 2023 |