“The Effect of Cow Manure on the Growth and Production of Lettuce (Lactuca Sativa L.)”. Agrikan Jurnal Agribisnis Perikanan 16, no. 2 (October 5, 2023): 9–15. Accessed October 31, 2025. https://jurnal.ummu.ac.id/index.php/agrikan/article/view/1697.