Devia, Della, Puji Lestari, and Emenda Sembiring. “LIFE CYCLE ASSESSMENT (LCA) PRODUK SEMEN PORTLAND KOMPOSIT (STUDI KASUS: PT X)”. Jurnal Teknik Lingkungan 23, no. 2 (October 3, 2017): 1-10. Accessed September 23, 2025. https://journals.itb.ac.id/index.php/jtl/article/view/11983.