Eijsackers, H., M. Maboeta, and P. Doelman. “Vital Soil As Basis for Sustainable Soil Management, a Survey of Soil Problems in The Netherlands and the Way to Tackle It, With an Assessment for the South African Situation”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, Vol. 25, no. 4, Sept. 2006, pp. 300-17, doi:10.4102/satnt.v25i4.174.