1. Major minerals in forages;McDowell,2000
2. The effects of slow-release copper boluses on cow reproductive performance and calf growth;Arthington;The Professional Animal Scientist,1995
3. Trace mineral supplementation in beef cattle I;Marston;Compendium of Continuing Education for the Practicing Veterinarian,1999
4. Free-choice mineral supplementation and methods of mineral evaluation;McDowell,1985
5. Applied aspects of vitamin E and trace mineral supplementation;Corah;Compendium of Continuing Education for the Practicing Veterinarian,1998