1. American Public Health Association, American Water Works Association and Water Pollution Control Federation. 1971. Standard methods for the examination of water and waste-water. 13th ed. APHA, Washington, DC. 974 pp.
2. Carawan, R. E., V. A. Jones, and A. P. Hansen. 1972. Water and waste-water management in dairy processing. UNC WWR1 No. 79, North Carolina State Univ., Raleigh.
3. Carawan, R. E., V. A. Jones, and A. P. Hansen. Water use in a multiproduct dairy. J. Dairy Sci. 62:0000.
4. Federal Water Pollution Control Act Amendments of 1972. Public Law 92-500.
5. Federal Water Pollution Control Administration. 1967. The cost of clean water. Vol. III. Industrial waste profile no. 9, dairies. U.S. Dept. of Interior, FWPCA No. I.W.P.-9. Washington, DC.