Mosey, Handy Indra Regain, and Benny Max Lumi. “PENENTUAN PERCEPATAN GRAVITASI LOKAL DI UNIVERSITAS SAM RATULANGI MANADO BERDASARKAN TEORI GETARAN HARMONIK”. Jurnal Ilmiah Sains, vol. 16, no. 2, Nov. 2016, pp. 104-7, doi:10.35799/jis.16.2.2016.15150.