Expanding the repertoire of reference Available to Purchase

In the literature of librarianship, the education of a reference librarian has, on the whole, meant two things. First, it has referred to the theoretical and/or practical training in reference services that a student receives in library school. Second, it has meant the training, or lack of it, the new librarian receives in making the transition from library school to the reference desk. What reference education has not meant, to judge by the literature, is the ongoing training or professional development a working reference librarian might receive on the job.