Richa, S., Gupta, S., Roy, S., Urmila, U., & Sumiya, S. (2026). A Study To Evaluate The Effectiveness Of Selected Audio-Visual Modalities On Level Of Knowledge Rergarding Various Impacts Of Substance Abuse Among Adolescents At Higher Secondary Schools, Kanpur, Up. International Journal of Pharmaceutics and Drug Analysis, 14(3), 42-46. https://doi.org/10.47957/ijpda.v14i3.756