Development of First Proto-Types of a Low-Cost Computer Based Solid - State Spirometer for Application in Rural Health-Care Centres across India. Global Journal of Medical Research, [S. l.], v. 13, n. 13, p. 7–18, 2013. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/. Acesso em: 24 oct. 2026.