Tong Z, Awan M, Qingyun H. An Analysis of the Relationship between Immigration and the Development of Resource-based Cities in China - Centered on Daqing and Yichun in Heilongjiang Province. PLHR [Internet]. 2023 Mar. 15 [cited 2024 Nov. 22];7(2):47-5. Available from: https://ojs.plhr.org.pk/journal/article/view/396