Mei-Chih W, Chang T. Revisiting Oil Prices, Producer Price Index (PPI), and the Purchasing Managers Index (PMI) Nexus: China and the USA. 5002 [Internet]. 2019 Aug. 7 [cited 2024 May 21];9(8):913-25. Available from: http://archive.aessweb.com/index.php/5002/article/view/1848