2 1 10 Research on Accidents Involving Personal Injuries in 1979-1983 HAKKINEN, Sauli Additional Author Karttunen, Raimo Primary Author mixed material 9517539614 Otaniemi Helsinki University of Technology, Department of Mechanical Engineering, Industrial Economics and In 1986 HAKKINEN, Sauli Additional Author Karttunen, Raimo Primary Author mixed material 9519431527 Helsinki Liikenneturva - Central Organization for Traffic Safety, Research Department 1982