Kaufman DW, Fay PA, Kaufman GA, Zimmerman JL. Diversity of terrestrial macrofauna. 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; 1998:101 -112.