R. Husmaini, N. Nurmaini, and U. Salmah, “THE EFFECT OF OCCUPATIONAL ENVIRONMENTAL FACTORS ON ELEVATED BLOOD PRESSURE AMONG WORKERS IN A PALM OIL MILL: A CASE STUDY AT PT. X, LANGKAT REGENCY”, ijhes, vol. 8, no. 6, pp. 122-135, Jun. 2025.