Hutabarat, Niko Andreas, Winfronstein Naibaho, dan Saloom Hilton Siahaan. 2026. “Performance Analysis of Automatic Grass Chopper and Grass Vacuuming Machine With Gasoline Engine Drive System”. EDUCTUM: Journal Research 5 (2):292-99. https://doi.org/10.56495/ejr.v5i2.1625.