A vast collection of online library resources is available to Harvard researchers through the E-Research section of the Harvard Libraries site.

This guide will assist Harvard faculty, students, and librarians to create "persistent links" to digital library resources for "virtual" coursepacks, course web pages, research guides, and other applications. The terms "persistent link" or "persistent URL" will be used in this guide to describe a Web link that remains stable and unbroken over time.

Note: Users must have a valid Harvard ID/PIN to access most Harvard Library electronic resources.

There are now two ways to search the holdings of Harvard's libraries

HOLLIS	HOLLIS Classic

What's the Difference? HOLLIS is the newest way to find library materials, with relevance-ranked results and easily-refined searches. HOLLIS Classic is the original catalog - browse by subject, author, or title; search by call number, and search with non-Latin characters

See section Linking to HOLLIS and HOLLIS Classic Records for instructions for both versions on how to link to records.