Devia, Della, Puji Lestari, and Emenda Sembiring. 2017. “Life Cycle Assessment (LCA) Produk Semen Portland Komposit (Studi Kasus: PT X)”. Jurnal Teknik Lingkungan 23 (2):1-10. https://doi.org/10.5614/j.tl.2017.23.2.1.