“UTILITY OF ULTRASOUND IN PREDICTING FETAL LUNG MATURITY REGIONAL HOSPITAL HUANCAYO ESSALUD (2008)”. University Prospective in Engineering and Technology 8, no. 2 (January 15, 2022): 75–80. Accessed April 7, 2025. https://revistas.uncp.edu.pe/index.php/prospectiva/article/view/1274.