"value added" engines

[Nicholas Tomaiuolo]

Web4lib--
The Northern Light search engine has a component that locates searchers'
keyword input from a "special collection" (this amounts to a
bibliographic database of magazine and journal articles) as well as
searching for web documents.

Is anyone aware of any other search engines that offer this service,
namely, to do a parallel search in a database of traditional print
publications?

Thank you for your help,
Nicholas Tomaiuolo
Burritt Library
Central CT State University
New Britain, CT  06050