4e congres interanational des distributions d'eau = 4th international water supply congress. Sujet = Subject no. 3 : prospection des eaux suterraines puits et forages = prospecting for ground water : well sinking and borehole drilling /
Raporteur general A. Achten.
- Bruxelles : Impr. Excelsior, 1958.
- 136 p. : ill., fig.