American Public Health Association. 1980. Methods of Air Sampling and Analysis. 2nd ed.
American Public Health Association — American Water Works Association — Water Pollution COntrol Federation. 1980. Standard Methods for Examination of Water and Wastewater., 15th ed. American Public Health Association, New York.
Awotwi, E. K. and Anderson, L. L. 1982. The effects of isolation, photoperiod, and olfactory bulbectomy on growth and puberty in Yorkshire gilts. Journal of Animal Science 55: Suppl. 1, pp. 106 (Abstr.).
Brooks, P. H. and Cole, D. J. A. 1970. The effect of the presence of a boar on the attainment of puberty in gilts. Journal of Reproduction and Fertility 23: 435–440.
Caton, J. S., Jesse, G. W., Day, B. N. and Ellersieck, M. R. 1986. The effect of confinement on days to puberty in gilts. Journal of Animal Science 62: 1203–1209.
Chiba, L. I., Peo, E. R., Lewis, A. J., Brumm, M. C., Fritschen, R. D. and Crenshaw, J. D. 1985. Effect of dietary fat on pig performance and dust levels in modified-open-front and environmentally regulated confinement buildings. Journal of Animal Science 61: 763–781.
Christenson, R. K. 1981. Influence of confinement and season of the year on puberty and estrous activity of gilts. Journal of Animal Science 52: 821–830.
Christenson, R. K. and Ford, J. J. 1979. Puberty and estrus in confinement-reared gilts. Journal of Animal Science 49: 743–751.
Curtis, S. E. 1972. Air environment and animal performance. Journal of Animal Science 35: 628–634.
Curtis, S. E., Anderson, C. R., Simon, J., Jensen, A. H., Day, D. L. and Kelley, K. W. 1975. Effects of aerial ammonia, hydrogen sulfide and swine-house dust on rate of gain and respiratory-tract structure in swine. Journal of Animal Science 41: 735–739.
Diekman, M. A. and Hoagland, T. A. 1983. Influence of supplemental lighting during periods of increasing or decreasing daylength on the onset of puberty in gilts. Journal of Animal Science 57: 1235–1242.
Donham, K. J., Yeggy, J. and Dague, R. R. 1985. Chemical and physical parameters of liquid manure from swine confinement facilities: health implications for workers, swine and the environment. Agricultural Wastes 14: 97–113.
Drummond, J. G., Curtis, S. E. and Simon, J. 1978. Effects of atmospheric ammonia on pulmonary bacterial clearance in the young pig. American Journal of Veterinary Research 39: 211–212.
Harvey, W. R. 1975. Least squares analysis of data with unequal subclass numbers. U.S. Department of Agriculture, ARS H-4.
Kirkwood, R. N. and Aherne, F. X. 1985. Energy intake, body composition and reproductive performance of the gilt. Journal of Animal Science 60: 1518–1529.
Malayer, J. R., Diekman, M. A., Brandt, K. E., Green, M. L., Kelly, D. T., Sutton, A. L., Long, G. G. and Jones, D. D. 1987. Influence of manure gases on the onset of puberty in gilts. Journal of Animal Science 64: 1476–1483.
Meacham, T. N. and Massincupp, F. B. 1970. Effect of confinement on reproduction and several blood components in gilts. Journal of Animal Science 31: 226 (Abstr.).
Meyer, D. J. 1985. Solutions to reduce ammonia levels in swine facilities. Proceedings of 5th International Symposium on Agricultural Wastes, American Society of Agricultural Engineers, pp. 461–467.
Niswender, G. D. 1973. Influence of the site of conjugation on the specificity of antibodies to progesterone. Steroids 22: 413–424.
Rampacek, G. B., Kraeling, R. R. and Kiser, T. E. 1981. Delayed puberty in gilts in total confinement. Theriogenology 15: 491–499.
Signoret, J. P. and Mauleon, P. 1962. [The effect of surgical removal of the olfactory bulbs on the sexual cycle and the genital tract of sows.] Annales de Biologie Animate, Biochimie et Biophysique 2: 167–177.
Stombaugh, D. P., Teague, H. S. and Roller, W. L. 1969. Effects of atmospheric ammonia on the pig. Journal of Animal Science 28: 844–847.
Steel, R. G. D. and Torrie, J. H. 1980. Principles and Procedures of Statistics. 2nd ed. McGraw-Hill, New York.
Sutton, A. L. and Nye, J. C. 1982. Influence of waste management on animal health and welfare. American Society of Agricultural Engineers, No. 82–4036.
Thompson, L. H. and Savage, J. S. 1978. Age at puberty and ovulation rate in gilts in confinement as influenced by exposure to a boar. Journal of Animal Science 47: 1141–1144.