Salmah, U. .; Indirawati, S. M. .; Situmorang, R. F. .; Nainggolan, P. I. .; Syahputra, D. A. . THE DESIGN OF ONLINE SMART APPLICATION SIRISKA (WORK RISK MAPPING SYSTEM): A STUDY OF OIL PALM HARVESTING WORKERS IN PTPN IV ADOLINA PLANTATION. MULTI RES LIT 2023, 2, 265-270.