van Huyssteen, I., A.R. Mulidzi, A.H. Meyer, and J. Wooldridge. 2020. “Alteration Index Three Facilitates Interpretation of β-Glucosidase, Acid-Phosphatase and Urease Activities in Soils Irrigated With Diluted Winery Wastewater”. South African Journal of Enology and Viticulture 41 (2):238-44. https://doi.org/10.21548/41-2-4195.