Ristanti, Felisia Ferra, and Fajar Arianto. 2019. “FLASH CARD MEDIA UTILIZATION TO IMPROVE STUDENT ACTIVITY AND LEARNING OUTCOMES OF FAUNA DISTRIBUTION SUBTOPIC IN CLASS XI IPS I SMA XIN ZHONG SURABAYA”. Geosfera Indonesia 4 (2):90-104. https://doi.org/10.19184/geosi.v4i2.9968.