CHOWDHRY, B. S., A. R. MEMON, M.D. MAKHDOOM, and D. R. GAUTAM. “? PERSONAL COMPUTER BASED RAILWAY MONITORING AND SIGNALING SYSTEM”. Biological Sciences - PJSIR 38, no. 5-6 (June 19, 1995): 220–228. Accessed November 22, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/2479.