TY  - BOOK
AU  - Smedana, Lambert K  .
AU  - Rycroft,David W  .
TI  - Land drainage: Planning and design of agricultural drainage systems / 
SN  - 0  7134  35003   3
U1  - 631.587 
PY  - 1983///
CY  - London : 
PB  - Bats ford academic&educational Ltd , 
ER  -