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APA Citation
Zhai, H., Yao, J., Qi, J., Wang, G., & Zhang, T. (2021). spatial-temporal characteristics and influencing factors of NO2 and SO2 in the Beijing-Tianjin-Hebei region based on satellite remote sensing. IOP conference series, 687(1), . http://access.bl.uk/ark:/81055/vdc_100123375561.0x00002c