Whitley, A.E., J.L. Moir, P.C. Almond, and D.J. Moot. 2016. “Soil PH and Exchangeable Aluminium in Contrasting New Zealand High and Hill Country Soils”. NZGA: Research and Practice Series 16 (January):169-72. https://doi.org/10.33584/rps.16.2016.3245.