Fondo "Giorgio e Gabriella Nebbia" - Sezione "Energia Solare"
5.33 M.Ayasi, Drainage and Reclamation in Garmsar Area (Unesco-Iran Symposium on salinity problemes in the arid zones, Theran, 11-15 oct.1958). Washing the end of piezometer in order to provide a cavity so to facilitate entering of water.