For more journals in this field do the following search in the Advanced Keyword Screen below:
1. Change the first search window to Subject by clicking on the dropdown arrow to the left.
2. Enter any one of the following:
middle ages periodicals
3. Click on Submit.
The AHA Guide to Historical Literature will get you started on any time period anywhere in the world. The link is to the online version. You might find it easier to start with the print version to see how it is organized.