1. *Anonymous. Method 200.8: Determination of Trace Elements in Waters and Wastes by Inductively Coupled Plasma-Mass Spectrometry, Revision 5.4. https://www.epa.gov/esam/epa-method-2008-determination-trace-elements-waters-and-wastes-inductively-coupled-plasma-mass (accessed 7 June 2021). United States Environmental Protection Agency, Cincinnati, OH, USA, 1994
2. Anonymous. AOAC Official Method 999.11. Determination of Lead, Cadmium, Copper, Iron, and Zinc in Foods: Atomic Absorption Spectrophotometry after Dry Ashing. https://img.21food.cn/img/biaozhun/20100108/177/11285282.pdf (accessed 14 June 2021). AOAC International, Rockville, MD, USA, 2002
3. *Anonymous. Farm Facts 3-7. Zinc Treatment Recipes and Dose Rates. https://www.dairynz.co.nz/publications/farmfacts/animal-health-welfare-and-young-stock/farmfact-3-7/ (accessed 12 January 2021). DairyNZ, Hamilton, NZ, 2015
4. *Anonymous. Facial Eczema. https://www.dairynz.co.nz/animal/cow-health/facial-eczema/ (accessed 12 January 2021). DairyNZ, Hamilton, NZ, 2020
5. The effect of zinc oxide and elemental zinc boluses on the concentrations of Zn in serum and faeces, and on providing protection from naturalPithomyces chartarumchallenge in calves