@proceedings {KNZ00548, title = {Effects of bison grazing on plant species diversity in tallgrass prairie}, year = {1996}, pages = {215 -216}, keywords = {LTER-KNZ, tallgrass prairie}, author = {D.C. Hartnett and Hickman, K.R. and Walter, L.E.F.}, editor = {West, N.E.} }