Castro, Amado A.Barros, BrunoGamboa, Eduardo2024-11-212024-11-211974-01https://selib.upd.edu.ph/etdir/handle/123456789/1951enUniversity of the PhilippinesMicro-operationMacro-systemAn application on the systems approach to the study of students and cost flows in selected units of the UPThesis