«Maternal, Newborn and Child Health (MNCH) Services Utilization: A Comparative Case Study of Tertiary and Primary Health Care Facilities in Cross River State». African Journal of Biomedical Research, libk. 24, zenb. 1, 2021(e)ko urtarrilaren, or. 81-92, https://ojshostng.com/index.php/ajbr/article/view/1154.