TY - UNPB A1 - Laksanawati, Wahyu Dian AV - public TI - The effect of using google classroom on students? mastery of physics concepts through the discovery learning model UR - http://repository.uhamka.ac.id/id/eprint/27606/ N1 - Unpublished ID - repository27606 JF - The effect of using google classroom on students? mastery of physics concepts through the discovery learning model ER -