DR. PANKAJ.K.SINGH; PROF. S.C.BHATT. Study of Ultrasonic Parameters of Polyvinyl Butyral. Global Journal of Science Frontier Research, [S. l.], v. 10, n. 6, p. -, 2010. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/182. Acesso em: 3 may. 2024.