TY  - BOOK
ED  - E.U.A. Soil Conservation Service
TI  - Drainage
T2  - National Engineering handbook section
U1  - 631.6 
PY  - 1959///-
CY  - Washington
PB  - The Service
KW  - Drenaje
N1  - La biblioteca tiene: v.1 Principles of draninage.-- v.2 Drainage survey, investigations and reports.-- v.3 Subsurface drainage of irrigated land in arid and semi-arid areas.--v.4 Subsurface drainage in humid areas.--v.5 Tile systems and appurtenances.--
ER  -