Over the past ten years I have been either serving on the RASD, Reference Sources Committee or working on the publication of their Reference Sources for Small and Medium-sized Libraries, Third, Fourth and currently the Fifth Edition. From my experience working on these projects I intend to address the readership of this periodical. During this time I must have handled three to four thousand quality reference tools, helping to make decisions whether or not they were to be included on the lists or in the publications. Many times they have been essential tools for libraries larger than the libraries defined in the preface to Reference Sources for Small and Medium-sized Libraries.