1. Rain interception by wheat and sugar-beet crops;Appelmans,1980
2. Methods of measuring and analyzing rainfall interception by grass;Crouse;Bull. IASH.,1966
3. Ruissellement diffus, ravinement et badlands dans le bassin de Kasserine (Tunisie steppique);De Ploey;Livre jub. M. Solignac. Min. Economie nat., Ann. Mines et Geologie.,1973
4. A consistency index and the prediction of surface crusting on Belgian loamy soils;De Ploey,1979
5. The climate near the ground;Geiger,1966