Marena, Betari, and Sari Edi Cahyaningrum. “THE EFFECT OF PVA ON THE PRODUCTION OF UREA SLOW RELEASE FERTILIZER ON MODIFIED CHITOSAN MATRIX”. Unesa Journal of Chemistry, vol. 13, no. 3, Sept. 2024, pp. 83-88, doi:10.26740/ujc.v13n3.p83-88.