Identifikasi Kadar Hemoglobin Rendah Pada Calon Pendonor Darah Di Yogyakarta: Identification of Low Hemoglobin Levels in Prospective Blood Donors in Yogyakarta. JoH 2025, 12 (1), 139-148. https://doi.org/10.30590/joh.v12n1.1143.