Richa, Shakya, Savitri Gupta, Shailja Roy, Urmila Urmila, and Syed Sumiya. 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.