World Catalog (WorldCat) is a database containing over 46 million records for books, periodicals and other
media held by libraries in over 65 countries. The detailed bibliographic record for each entry contains all the
information that you need to complete an ILL request including the ISBN (for books), ISSN (for periodicals)
and OCLC numbers.

But what if you want or need to get access to the material immediately?

How to gain access to other libraries . . .