帕累托定律对民族院校图书馆读者服务工作的影响——以青海民族大学图书馆为例
파루탁정률대민족원교도서관독자복무공작적영향——이청해민족대학도서관위례
The Influence of Pareto Principle on the Reader Service of the Libraries of Ethnic Universities & Colleges——Taking the Library of Qinghai University for Nationalities as an Example
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