Q. Can I look for the full text for a citation using Zotero?

Zotero has a "lookup" function on the toolbar that you can use to find the full text for a citation.  https://www.zotero.org/support/locate.

To use the "library lookup" you will need to have a "resolver" configured in your preferences.  Go to Preferences->Advanced.  For Wheaton enter http://sfx.carli.illinois.edu/sfxwhe in the resolver box.