Alfishky, P.; Nadiyah, S.; Puspita, R.; Ariani, R.; Pratomo, H. THE EFFECT OF THE COVID-19 TRANSITION PERIOD IN 2022-2023 ON THE NUMBER OF VOLUNTARY BLOOD DONORS BASED ON GENDER AND AGE IN SMA NEEGRI 1 SEMARANG. JTEMP 2024, 5, 46-51.