Some journal articles are not available online. Others may offer full text, but not through the database you are using. Use the 36-0 Link to Full Text icon to determine the availability of the article. A few journals are only available in the library. These are on the second floor Periodicals area. If Auraria Library, doesn't own an article online or in print. Request the article via Interlibrary Loan.
SciFinder has their own link for finding full text. Click on these links to search for full text.