Libraries: A Voyage of Discovery

Link: 

http://ifla.queenslibrary.org/iv/ifla71/papers/047e-Hallam_Partridge.pdf

Starting on page five, this report discusses the types and positions of librarians.  ISTJs and INTJs are the most common types; INTPs are also frequent.  ISFJs, INFJs, and INFPs are also favored in certain areas.