Search the Visual Catalog for your periodical
When you find the periodical, click "Place Hold"
Login with your Library Card number and Last Name
Select your pickup location and issue(s) and click "Submit Hold"
You can also use the Classic Catalog to place holds on individual issues of magazines and periodicals.
For example, search for Sky & Telescope in the classic catalog and click on the title to view the full record. Scroll down to the "Holdings information" and select the "Place hold" link to the right of the issue you want.