Ritzema, H.P.

Ritzema, H.P., 1994. Drainage principles and applications 2nd rev. ed.e ed., (ILRI publication no. 16) Wageningen, The Netherlands: International Institute for Land Reclamation and Improvement. Available at: https://nl.ircwash.org/sites/default/files/Ritzema-1994-Drainage.pdf.