TY - RPRT TI - A spatial cluster analysis of tractor overturns in Kentucky from 1960 to 2002 AU - D.M. Saman AU - H.P. Cole AU - A. Odoi AU - M.L. Myers AU - D.I. Carey AU - S.C. Westneat PY - 2012 DO - 10.1371/journal.pone.0030532 UR - https://pubs.usgs.gov/publication/70032434 ID - 70032434 ER -