Sitohang, Jendri, Sidabutar, James, Hasballah, T, AND Siahaan, Enzo. " ANALISA UJI PRODUKTIVITAS MESIN PERATA TEPI BATU BATA KAPASITAS 250 BB/JAM" Jurnal Teknologi Mesin UDA [Online], Volume 5 Number 1 (10 June 2024)