“…This placed tractors fourth among the agents associated with injuries. With fatal injuries, however, most studies (Ahering et al, 1992;Ambe & Murphy, 1995;Ford et al, 1997;Myers, 1997;Myers & Hard, 1995;Purschwitz & Field, 1991;Reiling, 1997;Richardson & Lambert, 1997;Teret & Langlois, 1991;Ungar et al, 1997;Zwerling, Merchant, Reynolds, Burmeister, & Stromquist, 1997) showed tractors ranking first, with other machinery a distant second.…”