UMIYAH, Astik. PERBEDAAN PENGUKURAN TAKSIRAN BERAT JANIN MENGGUNAKAN RUMUS JOHNSON TOHSACK DAN ULTRA SONO GRAFY. Oksitosin : Jurnal Ilmiah Kebidanan, [S. l.], v. 2, n. 2, p. 80–87, 2015. Disponível em: https://journal.ibrahimy.ac.id/index.php/oksitosin/article/view/427. Acesso em: 4 mar. 2026.