Efektifitas pencegahan penyalahgunaan narkoba dikalangan siswa oleh guru dalam rangka mewujudkan ketahanan nasional (studi kasus SMAN 4 Batanghari dan SMKN 4 Batanghari Kabupaten Batanghari) = Prevention effectiveness of abuse of narcotic and elicit drugs in students circle by teachers in order to manifest national defense (case study on state senior high school 4 of Batanghari and vocational senior high school 4 of Batanghari Regency of Batanghari) / Ramzil Huda - Ramzil Huda, author (2016)