Here is a short article on the LibX Toolbar (excerpted from OIT Matters Vol. 8, No. 1, Fall 2008):

The vast print and online resources of the Princeton University Library can overwhelm even seasoned scholars. Fortunately, new tools are significantly improving access to relevant

scholarly material and easing the entire process of research. At the September 9 Lunch ’n Learn seminar, Steven Adams, the Biological and Life Sciences Librarian and Interim Psychology Librarian, officially launched the LibX PUL toolbar, an amazing browser plug-in for Firefox that amalgamates several databases and library systems to make the research process more efficient. With LibX, your internet browser becomes an effective portal to the entire library experience.

The left portion of the toolbar contains a pull-down menu with more convenient access to the most popular Princeton University Library links. The utility also offers the powerful ability to search the Princeton University Library Catalog, as well as other key databases, quickly from your web browser. The list currently includes WorldCat, a global catalog of library collections; EBSCO, a premier platform for full text online research; ProQuest, a collection of more than 125 billion digital pages of the world’s scholarship; JSTOR, an online archive of academic journals; Scopus, a large archive of science abstracts and citations; and Google Scholar, a honed online archive assembled by Google and several academic libraries.

Thanks to the toolbar, when you receive results within your browser, you will often see a Find it @ PUL image if the displayed reference is available within the University’s library system.

By clicking on the Find it @ PUL button, you will receive an interesting range of additional and useful options. You can locate the item in Princeton’s print or online collections, search in Google Scholar, or, if Princeton does not have access to the item, make an Interlibrary Loan request; or you can easily incorporate the citation into your bibliography via  RefWorks. Members of the University community can download the LibX PUL toolbar at http://libguides.princeton.edu/libx .