1. Barrada, M. S. 1957. Response of Dairy Cattle to Hot Environments with Special Emphasis on Respiratory Reaction. Ph.D. thesis, Johns Hopkins University, Baltimore, Maryland.
2. Graham, W. R., Jr., Turner, C. W., and Gomez, E. T. 1937. A Method for Obtaining Arterial Blood from the Goat. Missouri Agr. Expt. Sta., Research Bull. 260.
3. Lactic Acid, Peruvic Acid, Amino Acids, Acetone Bodies, Oxygen. Carbon Dioxide, and Hemoglobin in Arterial and Mammary Venous Bloods of Cows Under Various Physiological Conditions;Shaw;J. Dairy Sci.,1946