ROHIT BALDAR; AKSHAY PATIL; HARISH PATIL. AUTOMATIC BOOK VENDING MACHINE. International Journal of Innovations in Engineering Research and Technology, Maharashatra, India, v. 5, n. 4, p. 1–3, 2021. Disponível em: https://repo.ijiert.org/index.php/ijiert/article/view/1484.. Acesso em: 31 jan. 2025.