Some WWW journals, especially those published directly by authors, universities or libraries, may be offered at no cost above the Internet access costs. In addition to the availability of electronic journals, there is now a very competitive commercial market for providing document delivery services. Needless to say, librarians are evaluating the role of commercial suppliers within the traditional interlibrary loan process. Some document suppliers charge a royalty fee whether the publisher does or not. You may pay extra for 24-hour or fax delivery.
Fill rates vary dramatically between suppliers.
Turnaround times can be inconsistent. Although the market is changing, commercial suppliers tend to provide access to current journals only. The Lewis Library is a key player in the information delivery market. The journal collection includes 2100 print titles and comprehensive holdings for the majority of the titles held. Normal turnaround time to fill requests from the library's journal collection is 24-hours or less.