Nurhandoko, B.E.B., Martha, R.K., Triyoso, K. , Wibowo, S.A. and Widowati, S. 2021. Airflow Study of A Closed Room in the Public Spaces and Mass Transportation for Healthy and Safe from The Transmission of Covid19. Jurnal Perencanaan Pembangunan: The Indonesian Journal of Development Planning. 5, 1 (Apr. 2021), 20–31. DOI:https://doi.org/10.36574/jpp.v5i1.158.