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The Spatio-temporal Changes on Ecological Environment of the Lower Reaches of Luanhe River from 1985 to 2015
CHEN Mingye, CHEN Lei, LIU Suhong, GAO Baojia
Forest and Grassland Resources Research . 2016, (5): 118 -123 .  DOI: 10.13466/j.cnki.lyzygl.2016.05.021