The Wikipedia Library wants to help editors help each other with research. A way to do that is to set up a source sharing or resource exchange page on your local Wikipedia. Editors request access to a specific source and other editors give them access to it.
There are lots of ways to help other editors do research when they need a source.
Show them how to get access
Look something up for them in the source
Send them a copy of a few pages
Upload a copy to a file-sharing service
Email them a link to the full document
Send them a book through the mail
Coordinators then update the source sharing page and archive filled or stale requests.
Sharing access to a source should be for the educational, non-commercial, fair use purpose of improving Wikipedia articles. Editors who share access do so at their own risk, and take responsibility for respecting the copyright of the source. Sharing private information with other editors about your real name, email address, or shipping address is done at your own risk.