Research on Supply and Demand of Habitat Maintenance Services: A Case Study of Beijing-Tianjin-Hebei Region
WANG Yalin, NIU Mingshuang, SONG Bo
Acta Scientiarum Naturalium Universitatis Pekinensis . 2021, (2): 381 -389 .  DOI: 10.13209/j.0479-8023.2020.123

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