IMPACTS OF INDUSTRIAL CLUSTERING ON WATER ENVIRONMENTAL 
POLLUTION IN YANGTZE RIVER ECONOMIC ZONE BASED ON SPATIAL 
METERING AND THRESHOLD EFFECT TEST
YANG Kaijun, XIONG Minmin
Resources & Industries . 2021, (4): 21 -29 .  DOI: 10.13776/j.cnki.resourcesindustries.20210603.001