Lumban Toruan K, Barus EIC, Sinambela M. RANCANG BANGUN KALIBRATOR PORTABLE PENAKAR HUJAN TIPPING BUCKET . METHODIKA [Internet]. 2023 Sep. 10 [cited 2024 Jul. 3];9(2):35-42. Available from: https://ejurnal.methodist.ac.id/index.php/methodika/article/view/2320