“Copper & Cobalt Mineral Deficiencies Wool Australia Sheep”, “Mineral Deficiencies Copper and Cobalt”, “No. 7 ‘Science Aids Wool’ Series”,

“In order to maintain stock in healthy condition, it is necessary that their food intake should contain a number of chemical substances — some complex, some simple”, “Certain of the minerals are essential to maintain life, be it animal or plant life. Others are not so important, but are needed in proper balance; too much may poison, and too little may cause malnutrition”, “Such Minerals as copper and cobalt are required only in minute quantities, but those quantities are nevertheless essential”,