1. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1965
2. Burnett, W. E., and N. C. Dondero, 1969. Microbiological and chemical changes in poultry manure associated with decomposition and odor generation. 271-291. Animal Waste Management Conference. Syracuse, New York.
3. Gas-liquid chromatographic method for volatile fatty acids in milk;Hankinson;J. Dairy Sci.,1958
4. The characterization and control of anerobic digestion;Kotze;Water Research,1969
5. Sobel, A. T., 1969. Measurement of the odor strength of animal manures. 260-270. Animal Waste Management Conference, Syracuse, New York.