Ougha, C.S. and Kriel, A. 2017. Ammonia Concentrations of Musts of Different Grape Cultivars and Vineyards in the Stellenbosch Area. South African Journal of Enology and Viticulture. 6, 1 (May 2017), 7–11. DOI:https://doi.org/10.21548/6-1-2353.