A good source is the PubMed Journals Database (in the left sidebar). Enter your abbreviation to get the full title – or enter the full title to find the abbreviation.
Another possibility is to use sources in the Journal/Book Information tab of the LibGuide "Scientific Writing and Publishing for Health Sciences"(see the box labeled "Journal Information Databases")
If your journal title still is not found, there are two more comprehensive print sources available for consultation (click on their titles to check location and availability in the Mirlyn Library Catalog):
For more assistance please email email@example.com