TY  - BOOK
AU  - Rijtema, P. E., 
AU  - Wassink, H., 
ED  - Unesco
ED  - International Ass, of Scientific Hydrology
TI  - Water in the unsaturated zone
PY  - 1970///
CY  - Bélgica : 
PB  - IASH, 
KW  - Hidrología
ER  -