1. Annual Report. 1966–67. Meal feeding of dairy cows and calves. New Zealand. Department. of Agricultural Research Division. Annual Report. p. 39.
2. Annual Report. 1967–68. Feeding and management of dairy cows. New Zealand. Department. of Agricultural Research Division. Annual Report. p. 41.
3. Anonymous. 1981. Dairy Industry Review. Reserve Bank of New Zealand. January-February, 1981. Pages 8–14. https://www.rbnz.govt.nz/-/media/ReserveBank/Files/Publications/Bulletins/1981/1981jan-feb44-1dairyindustryreview.pdf.