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12167556 
Journal Article 
Retraction Note to: Environmental PM2.5 concentration and optimization of college students’ mental health index based on variance parameter model 
Wang, Y; Luo, Q 
2021 
Yes 
Arabian Journal of Geosciences
ISSN: 1866-7511 
14 
22 
is retraction of 11989027 Environmental PM2.5 concentration and optimization of college students’ mental health index based on variance parameter model