Ahmad, Nasir, Adi Isworo, and Citra Indriani. 2021. “pidemiology nvestigation of yphoid ncidence in enior igh chool in agelang istrict”. erita edokteran asyarakat 37 (03), 85-90. https://doi.org/10.22146/bkm.v37i03.1718.