I Ketut Darma, I Gede Made Karma, I Made Anom Santiana and I Wayan Suastawa 2022. Effect Size of Mathematics Blended Learning Design on Increasing Mathematical Problem-Solving Ability of Polytechnic Students in the Covid-19 Pandemic Period. Logic : Jurnal Rancang Bangun dan Teknologi. 22, 1 (Mar. 2022), 43–50. DOI:https://doi.org/10.31940/logic.v22i1.43-50.