@article{745, author = "Kruip, P. C. J. de and Symposium sur la Triangulation spatiale européenne février 1969 - Paris", title = "The Adjustment of the Primary Triangulation of the Netherlands. A preliminary report on the computations in the period 1965 - 1968, related to the New Adjustment of the European Triangulatien ", year = "1969", note = "2 seš.", }