Rahim, Aaysha, and Najam Abbas Naqvi. 2021. “GNSS-and-GIS Based Android Integration of Mobile Based Virtual Guide Application ExpLahore for Walled City Lahore, Pakistan”. Natural and Applied Sciences International Journal (NASIJ) 2 (1). Peshawar, Pakistan:12-25. https://doi.org/10.47264/idea.nasij/2.1.2.