Oktavianto, D.A. et al. 2021. Blended Learning Integrated Fieldwork on Fundamentals of Geology Learning During The Covid-19 Pandemic. International Journal of Emerging Technologies in Learning (iJET). 16, 07 (Apr. 2021), pp. 90–104. DOI:https://doi.org/10.3991/ijet.v16i07.21213.