Comparison of GeoRef and Google Scholar

Recent studies have compared the coverage of topical bibliographic databases with Google Scholar. Overlap in coverage ranges from less than ten percent to over ninety percent; coverage by age of material varied greatly as well. A 2006 article by Neuhaus, et al. reported that overlap between Google Scholar and GeoRef was twenty-six percent and that there was a ‘pronounced bias toward English language publications”. This study looks more closely at the overlap between these two resources, with specific attention paid to overlap by language and date of publication.