"Maternal, newborn and child health (MNCH) services utilization: A comparative case study of tertiary and primary health care facilities in Cross River State". (2021) African Journal of Biomedical Research, 24(1), ص 81–92. موجود في: https://ojshostng.com/index.php/ajbr/article/view/1154 (تاريخ الوصول: 2 مايو 2026).