[求助]文献查找！

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哪位大侠帮忙查找一下下面三篇文献，都是有关离心压缩机的，万分感谢！！
Johnson M W Moore J.
. z. Z; W* l9 f! U3 p1 a% lThe Development of wake flow in a centrifugal impeller ASME Journal of Engineering for power1980 102:382~390
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2 I/ r; `* I' D' v Study on centrifugal impler and diffuser flow ASME journal of Engineering for power 1981,103:688~697

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; \  H" |! j; c/ NEckardt D.
4 n$ k* p! N; _Detailed flow investigation within a high-speed centrifugal compressor impeller ASME Journal of Fluid Eng