If you do not have the staff or time to do document retrieval there are many commercial services that will do it for you. These services can locate items for you, retrieve them, and arrange interlibrary loans. One of the best sources for such services is The Burwell World Directory of Information Brokers. It is organized by state with listings alphabetical by company name within the state. There is an index by city.
Pricing is included in most entries.
Watch for future articles in this series will include nonlibrary sources, sources outside of Southern California, and Washington, DC sources. All rights reserved.