The preliminary activities are summarised of the organisation of the 1st international symposium on flint, held on occasion of the annual meeting of the Netherlands Geological Society and the 5th anniversary of the excavations of prehistoric flintmines.

tentoonstelling, opgravingen, prehistorische vuursteenmijnen
Grondboor & Hamer

CC BY 3.0 NL ("Naamsvermelding")

Eerste Internationaal Symposium over vuursteen, Maastricht 26-29 april 1969, Nederland
Nederlandse Geologische Vereniging

F.H.G. Engelen. (1971). De organisatie van het symposium. Grondboor & Hamer, 25(3), 9–10.