.: 2. Deventer, Witteveen + Bos, 2004, square in-8°, 48 pp, with colour ills., publisher's cased binding. Text in Dutch.
.: 2. Deventer, Witteveen + Bos, 2003, square in-8°, 40 pp, with colour ills., publisher's cased binding. Tipped in at the end is a plastic sleeve which contains a CD disk ''Luchtdrukfluctuaties 360 x versneld''. Text in Dutch.