TY  - BOOK
AU  - W.F.J. Van Beers
TI  - Some nomographs for the calculation of drain spacings
U1  - 631.6 
PY  - 1969///
CY  - Wageningen
PB  - International Institute for Land Reclamation and Improvement
N1  - W.F.J. Van Beers: Some nomographs for the calculation of drain spacings.  Wageningen.  International Institute for Land Reclamation and Improvement, 1969.--(631.6VAN)
ER  -