Hayes, R. M. (1981). The Distribution of Use of Library Materials: Analysis of Data from the University of Pittsburgh.
Style de citation Chicago (17e éd.)Hayes, Robert M. The Distribution of Use of Library Materials: Analysis of Data from the University of Pittsburgh. 1981.
Style de citation MLA (9e éd.)Hayes, Robert M. The Distribution of Use of Library Materials: Analysis of Data from the University of Pittsburgh. 1981.
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