ROHIT BALDAR, AKSHAY PATIL, and HARISH PATIL. “AUTOMATIC BOOK VENDING MACHINE”. International Journal of Innovations in Engineering Research and Technology 5, no. 4 (March 27, 2021): 1–3. Accessed January 31, 2025. https://repo.ijiert.org/index.php/ijiert/article/view/1484.