Amira, S.; Febriani, H.; Syukriah, S.; Nur Faizah, U. Morpho-Histological Study of the Rat Spleen Post-Induction of Sodium Nitrite and Acorus Calamus L. Rhizome Ethanolic Extract. J. Ris. Biol. dan Apl. 2023, 5, 89-97.