1. AOAC (1991) Association of official analytical chemists. Official methods of analysis, Arlington, VA
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3. Armstrong DV (1994) Heat stress interaction with shade and cooling. J Dairy Sci 77:2044–2050
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5. Armstrong DV, Weirsma F, Fuhrman TJ, Tappan JM, Cramer SM (1985) Effect of evaporative cooling under a corral shade on reproduction and milk production in a hot climate. J Dairy Sci 68:167