Marviyani, Ericha Ayusepta, and Erman Erman. “SOME CONSTRAINTS IN ACHIEVING SCIENCE PROCESS SKILLS (SPS) IN SECONDARY SCHOOL WATULIMO DURING THE COVID-19 PANDEMIC”. PENSA E-JURNAL: PENDIDIKAN SAINS, vol. 9, no. 3, Dec. 2021, pp. 325-9, doi:10.26740/pensa.v9i3.38707.