2016. PENENTUAN PERCEPATAN GRAVITASI LOKAL DI UNIVERSITAS SAM RATULANGI MANADO BERDASARKAN TEORI GETARAN HARMONIK. Jurnal Ilmiah Sains. 16, 2 (Nov. 2016), 104–107. DOI:https://doi.org/10.35799/jis.16.2.2016.15150.