SPATIAL-TEMPORAL DIFFERENTIATION OF GREEN PRODUCTIVITY IN THE MIDDLE AND LOWER REACHES OF THE YELLOW RIVER BASIN UNDER THE BACKGROUND OF HIGH-QUALITY DEVELOPMENT
CHEN Jia-tao, ZHANG Kun-peng, MIAO Chang-hong
HUMAN GEOGRAPHY . 2021, (5): 138 -147 .  DOI: 10.13959/j.issn.1003-2398.2021.05.017