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CHEN JIANMIN, XIE XIAOMING, ZHAO YONGANG, GAI PEIXIN, XIE LEIMING,. STUDY OF INFRARED ABSORPTION SPECTRA IN THE YBa_2Cu_(3-x)M_xO_y(M=Fe, Al, Zn)SYSTEM[J]. Journal of Infrared and Millimeter Waves,1991,10(6):451~458