'n Vergelykende ampelografiese en ampelometriese studie van die tros van verskillende wyndruifcultivars by De Villiers, F. S. (Francois Stephanus)

Subjects: “…Viticulture -- Research -- South Africa -- Cape of Good Hope…”
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Evaluating the returns to research on a project level : cover crops in the South African wine industry by Morgan, John (John Idwal)

Subjects: “…Viticulture -- Research -- Economic aspects -- South Africa…”
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