Information treatment for information services > IA. Union catalogs catalogues National Union Catalog Mansell text on error analysis used in the introductory physics labs.1. Because a significant proportion of works held by libraries is not found in OCLC WorldCat, Mansell remains a valuable library resource. The results show that 72.2 percent of the records in Mansell were found in WorldCat and 27.8 percent of the sampled Mansell records were not (95% confidence interval ). The authors randomly selectedĪ sample of records from Mansell and then searched the records in OCLC WorldCat.
This article describes a research project that included a designed experiment and statistical analysis to sample and estimate the proportion of records in the 754 volumes of the National Union Catalog Pre-56 Imprints (Mansell) that also appear in OCLC WorldCat.
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