Cite
APA Citation
Henderi, , Rafika, A. S., Spits Warnar, H. L. H., & Saputra, M. A. (2020). an Application of Mask Detector For Prevent Covid-19 in Public Services Area. Journal of physics, 1641, . http://access.bl.uk/ark:/81055/vdc_100116172454.0x000059