Nugroho, T. D.; Iriani, I. Independent Production of Regular Portland Cement Assessed by Simulation and Net Present Value: Produksi Mandiri Semen Portland Biasa Dievaluasi Melalui Simulasi Dan Nilai Sekarang Bersih (NPV). ijins 2025, 26, 10.21070/ijins.v26i4.1603.