Kaufman DW, Kaufman GA, Fay PA, Zimmerman JL, Evans EW. Animal populations and communities. In: Knapp AK, Briggs JM, Hartnett DC, Collins SL Grassland Dynamics: Long-Term Ecological Research in Tallgrass Prairie. Grassland Dynamics: Long-Term Ecological Research in Tallgrass Prairie. New York: Oxford University Press; 1998:113 -139.