The development potential in Africa

by L. A. van Wyk
Published 1977-03-01

The threat against man and the reaction of the Christian - An economic viewpoint*

by L. A. van Wyk
Published 1978-03-01

Die belangrikheid van water as ’n basiese behoefte vir ekonomiese ontwikkeling in Streek 23

by L. A. van Wyk, W. Viviers
Published 1987-03-01

Water availability and demand in the development regions of South Africa

by A. B. de Villiers, W. Viviers, L. A. van Wyk
Published 1988-03-01

Watervraag en -beskikbaarheid in die humiede en ariede ontwikkelingstreke van Suid-Afrika

by A. B. de Villiers, L. A. van Wyk, W. Viviers
Published 1989-03-01