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Research on Technology Innovation Cooperation Network in the Middle Reaches of Yangtze River Urban Agglomeration from the Perspective of Gradient Theory
ZOU Fang, JIANG Lidan, HUANG Ying
Journal of Library and Information Science in Agriculture . 2021, (6): 54 -65 .  DOI: 10.13998/j.cnki.issn1002-1248.21-0307