A closer look at drug and violence prevention efforts in American schools [electronic resource] : report on the study of school violence and prevention / [prepared for U.S. Department of Education, contract no. EA96055001 ; prepared by David Cantor ... et al. ; Westat, Inc. in affiliation with Gottfredson Associates, Inc.].
Imprint
Washington, DC : U.S. Dept. of Education, Planning and Evaluation Service, [2002]