The easiest way to find full text journal articles is to use the Sprague Library's databases and limiting your search to "full text". However, if you can't find the full text in this way, you can use the Journals A-Z list to see if the library has access to the journal, what years it has access to, and in what format.
If the Sprague Library does not have access to the article you need, and you are unable to locate a copy through Google Scholar, you can request an article via Intelribrary Loan. Most articles requested via ILL are recieved in about 24 hours, but may be longer depending on availability.