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He Xiao-yan, Wang Fei, Bai Yu-hui and Yang Xiao, 2013. Complementarities Between Coal Mining Machinery Industry and Coal Mining Industry:
Evidence from China 1991-2006. Information Technology Journal, 12: 7014-7018.
DOI: 10.3923/itj.2013.7014.7018
URL: https://scialert.net/abstract/?doi=itj.2013.7014.7018
DOI: 10.3923/itj.2013.7014.7018
URL: https://scialert.net/abstract/?doi=itj.2013.7014.7018