In Internet Grateful Med, the built-in MeSH help is part of the search process. The National Library of Medicine maintains links to publishers' Web pages for more than a thousand journals. Some offer free access to selected articles. Many others provide full access to their regular subscribers. Some have other mechanisms for paid access.
Policies vary widely.
If you need help in finding the name of a journal, try PubMed's Journal Browser . The National Library of Medicine's Loansome Doc allows you to order documents after first establishing an agreement with a nearby medical library. Detailed information about Loansome Doc is available on the National Library of Medicine's Web Site, in the Fact Sheets section. Loansome Doc is built into Pub Med and Internet Grateful Med. Charges vary, also depending on the local library.