Haryanti RH, Hastuti TK, Hanim D. Short Message Service (SMS) Bunda: Innovation Policy to Reduce Maternal Mortality in Brebes. KSS [Internet]. 2017Jun.13 [cited 2020Jan.17];2(4):69-5. Available from: https://www.knepublishing.com/index.php/KnE-Social/article/view/869