Wieriks, K.

Wieriks, K. & Schulte-Wulwer-Leidig, A., 1997. Integrated water management for the Rhine river basin, from pollution prevention to ecosystem improvement. , pp.p. 147-156 : 3 fig., 1 tab. Available at: https://www.ircwash.org/sites/default/files/210-97IN-15804.pdf.