Sukhdeep Singh. 2021. “ANALYSIS OF HEAVY METALS CONTAMINATION ON GROUNDWATER RESOURCES AND SURFACE SOILS IN THE VICINITY OF BUDDHA NULLAH STREAM IN LUDHIANA, PUNJAB”. Vidhyayana - An International Multidisciplinary Peer-Reviewed E-Journal - ISSN 2454-8596 6 (6). https://j.vidhyayanaejournal.org/index.php/journal/article/view/529.