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Verslag van die Direkteur-Generaal Waterwese : vir die tydperk ... tot ... ; aan die Minister van Waterwese
(1991)
Annual report / International Institute for Land Reclamation and Improvement, Wageningen
(2000)
International Symposium on Land Clearing and Development in the Tropics
(1986)
Valuing information when risk preferences are nonneutral : an application to irrigation scheduling
Bosch, Darrell J., (1987)
The continuing search for relevance in agricultural economics
Eidman, Vernon R., (1995)
The promise and challenge of bioenergy : discussion
Eidman, Vernon R., (2007)