@techreport{oai:tsukuba.repo.nii.ac.jp:00022612, author = {Yamada, Tetsuji and Yamada, Tadashi and 山田, 直志 and Karmakar, Ratna and Liu, Gordon G.}, month = {}, title = {Determinants of social violence among the youth and their risky health behaviors : policy implications}, year = {1999} }