1. Univ. of Florida, Inst. of Food and Agric. Sci., Range Cattle Res. and Educ. Ctr.OnaFL33865
2. Univ. of Florida, College of Eng.Dep. of Environ. Eng. Sci.GainesvilleFL32611
3. Univ. of Florida, Inst. of Food and Agric. Sci.Dep. of StatisticsGainesvilleFL32611