Sewer Guard - Protector for Manhole Scavengers. IJSHRE [इंटर्नेट]. 20 मई, 2022 [उल्लेखित 22 अक्टूबर, 2026];10(5). पर उपलब्ध: https://ijournals.in/journal/index.php/ijshre/article/view/121