Maryani S, Respati SH, Astirin OP. Association Between Pregnant Woman Class and Pregnancy Complication in Tegal District, Central Java. J Matern Child Health [Internet]. 2017 Feb. 24 [cited 2024 May 2];1(4):214-9. Available from: http://www.thejmch.com/index.php/thejmch/article/view/31