Baillargeon, Raymond H.Tremblay, Richard E.Willms, Doug2010-04-222010-04-2219991999Hull, QC: Human Resources Development Canada, Applied Research Branch.http://hdl.handle.net/10393/12870enThe prevalence of physical aggression in Canadian children: A multi-group latent class analysis of data from the first collection cycle (1994-1995) of the NLSCYOther