The Ecological Environment Quality Warning of Zhengzhou Using Gray System Based on the PSR Model
WU Ke-ning
GUAN Xiao-ke
FENG Xin-wei
LU Qiao-ling
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Publication Date：2007-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 83-85,89 )