Rai S, Kumar R, Khatri D. Innovative Heavy Metal Waste Disposal System: Modular Approach for Senior Secondary Chemistry Teachers. SS [Internet]. 2017 Sep. 30 [cited 2025 Aug. 24];55(2-3):p.133-135. Available from: http://ejournals.ncert.gov.in/index.php/SS/article/view/2547