Which guide organizes articles by subject across periodical magazines and scholarly journals?

The Readers Guide to Periodical Literature is a comprehensive reference tool that organizes articles by subject from a wide range of periodical magazines and scholarly journals. This guide allows researchers, students, and library patrons to efficiently locate articles on specific topics within a well-structured format. It serves as a valuable index, compiling a variety of subject areas and enabling users to find relevant literature quickly by topic, which enhances the research process.

In contrast, the Education Index focuses specifically on educational topics and resources, thus limiting its scope compared to the broader subject coverage of the Readers Guide. The School Library Journal is a publication dedicated to library and information science interestingly, but it does not function as an indexing tool for articles. The EBSCO Serials Directory provides information on serial publications but is not specifically designed to organize articles by subject, making the Readers Guide the most suitable choice for the question asked.