Google Scholar revisited.

Purpose - The purpose of this paper is to revisit Google Scholar. Design/methodology/approach - This paper discusses the strengths and weaknesses of Google Scholar. Findings - The Google Books project has given a massive and valuable boost to the already rich and diverse content of Google Scholar. The dark side of the growth is that significant gaps remain for top ranking journals and serials, and the number of duplicate, triplicate and quadruplicate records for the same source documents (which Google Scholar cannot detect reliably) has increased. Originality/value - This paper discusses the strengths and weaknesses of Google Scholar. [ABSTRACT FROM AUTHOR]