Mangaraja SP Lumban Gaol; Zulkarnain Lubis; Erwin Nyak Akoeb. THE INFLUENCE OF TOPOGRAPHY, NUMBER OF DEPENDENTS AND AGE OF HARVESTERS ON INCOME SATISFACTION OF PALM PALM HARVESTERS AT PRAPAT RANTAU GARDEN PTPN III. IJEBAS 2024, 4, 1039-1047.