Gepubliceerd: 1969 (SWOV): Griep, D.J. research psychologist
The present official stop sign for use at night - a red light or a red light in combination with an illuminated white vat-type sign - are not sufficiently for road users. A new stop sign has...
Gepubliceerd: 1969 (SWOV): Griep, drs. D.J.; Thoënes, ir. E.
This report contains the results of an inquiry into the design of number plates made of reflectorized materials. The possibilities of identification especially by means of photography were taken into...
