URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/distribution-of-abo-and-d-antigen-expression-in-yogyakarta--java-island--a-pioneer-large--scale-study-in-indonesia-dcfcd07e645d245babe887e5e2daa016/9d85a8e8-794e-11ef-a04f-00505691351c