Hendrika Saputra, Padilah, and Ade Irwansyah Putra Nasution. 2021. “Effrctivenes Of The Biology Learning During The Covid-19 Pandemic Class X MIPA Mas Al Wasliyah Merbau North Labuhanbatu Regency”. International Journal Of Humanities Education and Social Sciences 1 (3). https://doi.org/10.55227/ijhess.v1i3.74.