1. The transition zone between fresh and salt water in coastal aquifers;Baer,1960
2. Zoutgehalte (with English summary);Berg,1958
3. Tuinbouw en waterverontreiniging;Berg;Mededelingen Dir. Tuinbouw,1967
4. Algemene beschouwingen over de waterhuishouding van Nederland;Biemond;Water,1956
5. The calculation of evapotranspiration from groundwater depth observations;Bloemen,1966