1998 journal article
Effects of dietary copper and molybdenum on copper status, cytokine production, and humoral immune response of calves
Journal of Dairy Science, 81(12), 3286–3292.
By: G. Gengelbach & J. Spears
Influence of level and source (inorganic vs organic) of zinc supplementation of immune function of growing lambs
Asian-Australasian Journal of Animal Sciences, 11(2), 139–144.
By: E. Droke, G. Gengelbach & J. Spears
1997 journal article
Effects of copper deficiency and copper deficiency coupled with high dietary iron or molybdenum on phagocytic cell function and response of calves to a respiratory disease challenge
Journal of Animal Science, 75(4), 1112–1118.
By: G. Gengelbach, J. Ward, J. Spears & T. Brown
The effects of copper deficiency with or without high dietary iron or molybdenum on immune function of cattle
Journal of Animal Science, 75(5), 1400–1408.
By: J. Ward, G. Gengelbach & J. Spears
1994 journal article
Effect of dietary copper, iron, and molybdenum on growth and copper status of beef cows and calves
Journal of Animal Science, 72(10), 2722.
By: G. Gengelbach, J. Ward & J. Spears
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