TY  - BOOK
ED  - National Drainage Symposium (
TI  - Proceedins
T2  - ASAE publication
U1  - 631.6 
PY  - 1977///)
CY  - St. Joseph, Mich.
PB  - American Society of Agricultural Engineers
KW  - Drenaje
KW  - Congresos
ER  -