Use NUsearch, Northwestern University Library's search tool, to find books, articles, documents, video, sound recordings, and other items across both the Evanston and Chicago campus libraries of Northwestern University

HINT: use the NUsearch Advanced Search page to build keyword searches more easily

Example search:            peacekeeping AND IGO* 
Even broader search:   (peacekeeping OR peacebuilding) AND (igo* OR ngo*)

You can limit your search results to "Full Text Online" to find items available online.  See below.