Muthamilselvan, A., Ajmal, S., Rubini, M. and Anitha, N. 2026. Groundwater Exploration using Ground Magnetic Survey along the Contact of Crystalline and Sedimentary Rocks in Parts of Perambalur District, Tamil Nadu, India. Journal of Geomatics. 20, 1 (May 2026), 89–98. DOI:https://doi.org/10.58825/jog.2026.20.1.296.